./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:14:57,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:14:57,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:14:57,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:14:57,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:14:57,475 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:14:57,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:14:57,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:14:57,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:14:57,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:14:57,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:14:57,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:14:57,482 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:14:57,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:14:57,484 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:14:57,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:14:57,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:14:57,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:14:57,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:14:57,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:14:57,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:14:57,490 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:14:57,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:14:57,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:14:57,491 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:14:57,491 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:14:57,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:14:57,492 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:14:57,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:14:57,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:14:57,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:14:57,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:14:57,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:14:57,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:14:57,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:14:57,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:14:57,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:14:57,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:14:57,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:14:57,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:14:57,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:14:57,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:14:57,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:14:57,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:14:57,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:14:57,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:14:57,817 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:14:57,819 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:14:57,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-20 12:14:59,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:14:59,599 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:14:59,599 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/watermelon.c [2024-09-20 12:14:59,607 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3e38d5921/2a00271d2f804bc2ab9f152052c34c22/FLAG6b42e97ed [2024-09-20 12:14:59,623 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3e38d5921/2a00271d2f804bc2ab9f152052c34c22 [2024-09-20 12:14:59,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:14:59,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:14:59,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:14:59,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:14:59,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:14:59,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f66a704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59, skipping insertion in model container [2024-09-20 12:14:59,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,658 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:14:59,822 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/watermelon.c[373,386] [2024-09-20 12:14:59,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:14:59,871 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:14:59,884 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/watermelon.c[373,386] [2024-09-20 12:14:59,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:14:59,914 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:14:59,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59 WrapperNode [2024-09-20 12:14:59,915 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:14:59,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:14:59,917 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:14:59,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:14:59,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,949 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:14:59,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:14:59,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:14:59,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:14:59,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:14:59,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,963 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,976 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:14:59,977 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,977 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:14:59,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:14:59,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:14:59,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:14:59,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (1/1) ... [2024-09-20 12:14:59,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:15:00,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:00,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 12:15:00,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 12:15:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:15:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-20 12:15:00,073 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-20 12:15:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:15:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:15:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:15:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-20 12:15:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-20 12:15:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:15:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:15:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:15:00,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:15:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:15:00,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:15:00,138 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:15:00,140 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:15:00,316 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 12:15:00,316 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:15:00,351 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:15:00,351 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:15:00,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:15:00 BoogieIcfgContainer [2024-09-20 12:15:00,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:15:00,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:15:00,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:15:00,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:15:00,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:14:59" (1/3) ... [2024-09-20 12:15:00,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b49abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:15:00, skipping insertion in model container [2024-09-20 12:15:00,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:14:59" (2/3) ... [2024-09-20 12:15:00,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b49abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:15:00, skipping insertion in model container [2024-09-20 12:15:00,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:15:00" (3/3) ... [2024-09-20 12:15:00,364 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2024-09-20 12:15:00,380 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:15:00,381 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:15:00,434 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:15:00,441 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;@68449f80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:15:00,441 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:15:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:15:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:15:00,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:00,454 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:00,455 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:00,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1545535369, now seen corresponding path program 1 times [2024-09-20 12:15:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798724801] [2024-09-20 12:15:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:15:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:01,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:01,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798724801] [2024-09-20 12:15:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798724801] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:01,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:15:01,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-20 12:15:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343609985] [2024-09-20 12:15:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:01,244 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:15:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:15:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:15:01,269 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:01,823 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2024-09-20 12:15:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 12:15:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-20 12:15:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:01,834 INFO L225 Difference]: With dead ends: 80 [2024-09-20 12:15:01,834 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 12:15:01,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:15:01,841 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:01,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 12:15:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-20 12:15:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-20 12:15:01,888 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2024-09-20 12:15:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:01,889 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-20 12:15:01,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:01,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-20 12:15:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:15:01,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:01,893 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:01,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:15:01,894 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:01,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 964775093, now seen corresponding path program 1 times [2024-09-20 12:15:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:01,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551903038] [2024-09-20 12:15:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:15:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:01,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:01,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551903038] [2024-09-20 12:15:01,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551903038] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:15:01,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 12:15:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545419473] [2024-09-20 12:15:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:01,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:15:01,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:15:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:15:01,986 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:15:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:02,079 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-20 12:15:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 12:15:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-20 12:15:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:02,081 INFO L225 Difference]: With dead ends: 51 [2024-09-20 12:15:02,081 INFO L226 Difference]: Without dead ends: 38 [2024-09-20 12:15:02,082 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:15:02,083 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:02,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-20 12:15:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-20 12:15:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-20 12:15:02,095 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 25 [2024-09-20 12:15:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:02,095 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-20 12:15:02,095 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:15:02,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-20 12:15:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:15:02,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:02,097 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:02,098 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:15:02,098 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:02,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1908872900, now seen corresponding path program 1 times [2024-09-20 12:15:02,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:02,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291459153] [2024-09-20 12:15:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:02,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 12:15:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:02,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:02,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291459153] [2024-09-20 12:15:02,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291459153] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:02,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:15:02,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 12:15:02,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578564554] [2024-09-20 12:15:02,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:02,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:15:02,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:15:02,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:15:02,182 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:02,269 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 12:15:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 12:15:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-09-20 12:15:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:02,270 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:15:02,270 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 12:15:02,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:15:02,272 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:02,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 12:15:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 12:15:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-09-20 12:15:02,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2024-09-20 12:15:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:02,284 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-09-20 12:15:02,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:02,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-09-20 12:15:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:15:02,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:02,286 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:02,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:15:02,287 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:02,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1551444720, now seen corresponding path program 1 times [2024-09-20 12:15:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:02,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357042183] [2024-09-20 12:15:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:15:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:02,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357042183] [2024-09-20 12:15:02,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357042183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:02,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460713601] [2024-09-20 12:15:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:02,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:15:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:02,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 12:15:02,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:15:02,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:15:02,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460713601] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:02,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:15:02,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-09-20 12:15:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551624126] [2024-09-20 12:15:02,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:02,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:15:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:15:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:15:02,771 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:02,866 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-09-20 12:15:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:15:02,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-20 12:15:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:02,868 INFO L225 Difference]: With dead ends: 51 [2024-09-20 12:15:02,868 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 12:15:02,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:15:02,870 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:02,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 12:15:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-20 12:15:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-09-20 12:15:02,881 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 26 [2024-09-20 12:15:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:02,882 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-09-20 12:15:02,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:02,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-09-20 12:15:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:15:02,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:02,883 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:02,903 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:15:03,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:03,088 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:03,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1138172918, now seen corresponding path program 1 times [2024-09-20 12:15:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:03,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294625912] [2024-09-20 12:15:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:15:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:03,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294625912] [2024-09-20 12:15:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294625912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860967958] [2024-09-20 12:15:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:03,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:03,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:03,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:15:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 12:15:03,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:03,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:03,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860967958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:03,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-20 12:15:03,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275207278] [2024-09-20 12:15:03,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:03,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:15:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:15:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:15:03,298 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:15:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:03,448 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-20 12:15:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:15:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-20 12:15:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:03,450 INFO L225 Difference]: With dead ends: 68 [2024-09-20 12:15:03,451 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 12:15:03,452 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:15:03,453 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:03,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 12:15:03,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 12:15:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-09-20 12:15:03,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2024-09-20 12:15:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:03,472 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-09-20 12:15:03,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:15:03,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-09-20 12:15:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:15:03,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:03,473 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:03,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:15:03,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:03,675 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:03,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1107312764, now seen corresponding path program 2 times [2024-09-20 12:15:03,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:03,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441919942] [2024-09-20 12:15:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:15:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:03,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:03,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441919942] [2024-09-20 12:15:03,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441919942] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:03,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:15:03,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 12:15:03,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172596121] [2024-09-20 12:15:03,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:03,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:15:03,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:15:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:15:03,871 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:04,041 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-09-20 12:15:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:15:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-20 12:15:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:04,043 INFO L225 Difference]: With dead ends: 48 [2024-09-20 12:15:04,043 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 12:15:04,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:15:04,044 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:04,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 12:15:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 12:15:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-20 12:15:04,071 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2024-09-20 12:15:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:04,071 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-20 12:15:04,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:04,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-20 12:15:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 12:15:04,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:04,073 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:04,073 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 12:15:04,074 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:04,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 545445883, now seen corresponding path program 1 times [2024-09-20 12:15:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:04,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165927527] [2024-09-20 12:15:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:15:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:15:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165927527] [2024-09-20 12:15:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165927527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334737749] [2024-09-20 12:15:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:04,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:04,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:04,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:04,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:15:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 12:15:04,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:04,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:04,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334737749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:04,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2024-09-20 12:15:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590331080] [2024-09-20 12:15:04,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:04,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:15:04,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:15:04,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:15:04,348 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:15:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:04,540 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-20 12:15:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:15:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-20 12:15:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:04,543 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:15:04,543 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:15:04,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:15:04,544 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:04,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:15:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 12:15:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-20 12:15:04,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2024-09-20 12:15:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:04,564 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-20 12:15:04,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:15:04,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-20 12:15:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:15:04,567 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:04,567 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:04,587 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:04,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:15:04,769 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:04,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash -60565722, now seen corresponding path program 1 times [2024-09-20 12:15:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062290684] [2024-09-20 12:15:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:04,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:15:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:04,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:04,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062290684] [2024-09-20 12:15:04,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062290684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:04,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769393420] [2024-09-20 12:15:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:04,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:04,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:04,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:04,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:15:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:04,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 12:15:04,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:04,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:15:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769393420] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:05,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-20 12:15:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208086166] [2024-09-20 12:15:05,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:05,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:15:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:15:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:15:05,028 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:15:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:05,184 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2024-09-20 12:15:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:15:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-20 12:15:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:05,186 INFO L225 Difference]: With dead ends: 54 [2024-09-20 12:15:05,186 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 12:15:05,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:15:05,187 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:05,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 12:15:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 12:15:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 12:15:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-09-20 12:15:05,201 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 32 [2024-09-20 12:15:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:05,201 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-09-20 12:15:05,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 12:15:05,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-09-20 12:15:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:15:05,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:05,206 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:05,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:15:05,410 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:05,411 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:05,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash 619492648, now seen corresponding path program 1 times [2024-09-20 12:15:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:05,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393721838] [2024-09-20 12:15:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:05,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:05,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:05,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:15:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:15:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393721838] [2024-09-20 12:15:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393721838] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:15:05,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:15:05,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-20 12:15:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708876403] [2024-09-20 12:15:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:15:05,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 12:15:05,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 12:15:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:15:05,640 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:05,955 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2024-09-20 12:15:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 12:15:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-20 12:15:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:05,956 INFO L225 Difference]: With dead ends: 53 [2024-09-20 12:15:05,956 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 12:15:05,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:15:05,958 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:05,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 12:15:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-09-20 12:15:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-09-20 12:15:05,974 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 32 [2024-09-20 12:15:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:05,975 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-09-20 12:15:05,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:05,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-09-20 12:15:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:15:05,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:05,978 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:05,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-20 12:15:05,978 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:05,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2067916900, now seen corresponding path program 2 times [2024-09-20 12:15:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786587895] [2024-09-20 12:15:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:06,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:06,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:06,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:15:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786587895] [2024-09-20 12:15:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786587895] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111176651] [2024-09-20 12:15:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:06,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:06,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:06,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:15:06,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:06,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:06,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 12:15:06,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:06,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111176651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:06,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:06,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-20 12:15:06,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614263501] [2024-09-20 12:15:06,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:06,932 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 12:15:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:06,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 12:15:06,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:15:06,934 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:07,365 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-09-20 12:15:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:15:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-20 12:15:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:07,367 INFO L225 Difference]: With dead ends: 61 [2024-09-20 12:15:07,367 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 12:15:07,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:15:07,370 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:07,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 12:15:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-09-20 12:15:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2024-09-20 12:15:07,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2024-09-20 12:15:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:07,387 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2024-09-20 12:15:07,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:07,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2024-09-20 12:15:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:15:07,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:07,390 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:07,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:15:07,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:15:07,591 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:07,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1242434853, now seen corresponding path program 2 times [2024-09-20 12:15:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:07,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471514735] [2024-09-20 12:15:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:07,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:07,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:07,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:07,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:15:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471514735] [2024-09-20 12:15:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471514735] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888463140] [2024-09-20 12:15:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:07,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:07,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:07,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:15:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:07,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 12:15:07,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:08,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888463140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:08,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:08,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-20 12:15:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919008367] [2024-09-20 12:15:08,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:08,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 12:15:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 12:15:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:15:08,473 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:08,883 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2024-09-20 12:15:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:15:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-20 12:15:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:08,884 INFO L225 Difference]: With dead ends: 55 [2024-09-20 12:15:08,885 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:15:08,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1653, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:15:08,886 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:08,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:15:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 12:15:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-09-20 12:15:08,906 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2024-09-20 12:15:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:08,908 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-09-20 12:15:08,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:08,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-09-20 12:15:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:15:08,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:08,909 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:08,924 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:09,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 12:15:09,110 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:09,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1389102369, now seen corresponding path program 3 times [2024-09-20 12:15:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:09,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659800743] [2024-09-20 12:15:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:09,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:09,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:09,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:09,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:15:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:09,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659800743] [2024-09-20 12:15:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659800743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655347319] [2024-09-20 12:15:09,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:09,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:09,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:09,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:15:09,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:15:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:09,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:15:09,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:09,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:10,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655347319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:10,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-20 12:15:10,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092652105] [2024-09-20 12:15:10,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:10,177 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 12:15:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 12:15:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:15:10,179 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:10,621 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-09-20 12:15:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:15:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-20 12:15:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:10,622 INFO L225 Difference]: With dead ends: 61 [2024-09-20 12:15:10,623 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:15:10,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 12:15:10,625 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:10,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:15:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2024-09-20 12:15:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-09-20 12:15:10,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 34 [2024-09-20 12:15:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:10,633 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-09-20 12:15:10,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:10,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-09-20 12:15:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:15:10,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:10,634 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:10,651 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:10,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:10,835 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:10,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1131745825, now seen corresponding path program 3 times [2024-09-20 12:15:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:10,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818259499] [2024-09-20 12:15:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:10,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:10,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:11,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:15:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818259499] [2024-09-20 12:15:11,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818259499] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:11,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080490474] [2024-09-20 12:15:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:11,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:11,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:15:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:15:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:11,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:15:11,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:11,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080490474] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:11,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2024-09-20 12:15:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76779830] [2024-09-20 12:15:11,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:11,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 12:15:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 12:15:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:15:11,837 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:12,277 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2024-09-20 12:15:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:15:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-09-20 12:15:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:12,279 INFO L225 Difference]: With dead ends: 56 [2024-09-20 12:15:12,279 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 12:15:12,280 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 12:15:12,280 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:12,281 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 12:15:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-20 12:15:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-09-20 12:15:12,289 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 34 [2024-09-20 12:15:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:12,297 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-09-20 12:15:12,297 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 38 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:12,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-09-20 12:15:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:15:12,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:12,298 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:12,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 12:15:12,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:12,503 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:12,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1974259355, now seen corresponding path program 4 times [2024-09-20 12:15:12,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:12,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404513072] [2024-09-20 12:15:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:12,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:12,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:12,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:12,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:15:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:12,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404513072] [2024-09-20 12:15:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404513072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918133579] [2024-09-20 12:15:12,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:15:12,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:12,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:15:12,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:15:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:12,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 12:15:12,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:13,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:13,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918133579] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:13,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:13,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-20 12:15:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188223591] [2024-09-20 12:15:13,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:13,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 12:15:13,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 12:15:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 12:15:13,345 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:13,801 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-09-20 12:15:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:15:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-20 12:15:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:13,803 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:15:13,803 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 12:15:13,804 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 12:15:13,805 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:13,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 12:15:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-09-20 12:15:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-09-20 12:15:13,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2024-09-20 12:15:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:13,817 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-09-20 12:15:13,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:13,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-09-20 12:15:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 12:15:13,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:13,818 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:13,837 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:15:14,022 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:15:14,023 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1359484736, now seen corresponding path program 4 times [2024-09-20 12:15:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605329268] [2024-09-20 12:15:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:14,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:14,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:14,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-20 12:15:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:14,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605329268] [2024-09-20 12:15:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605329268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335981911] [2024-09-20 12:15:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:15:14,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:14,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:14,313 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:15:14,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:15:14,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:14,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 12:15:14,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:14,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335981911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:14,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-20 12:15:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532853633] [2024-09-20 12:15:14,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:14,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 12:15:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 12:15:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 12:15:14,905 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:15,278 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2024-09-20 12:15:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:15:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-20 12:15:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:15,280 INFO L225 Difference]: With dead ends: 57 [2024-09-20 12:15:15,280 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 12:15:15,281 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=446, Invalid=2310, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 12:15:15,281 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:15,281 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 12:15:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 12:15:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-20 12:15:15,289 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2024-09-20 12:15:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:15,290 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-20 12:15:15,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:15,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-20 12:15:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:15:15,291 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:15,291 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:15,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:15,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:15:15,496 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:15,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1514281526, now seen corresponding path program 5 times [2024-09-20 12:15:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:15,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942167233] [2024-09-20 12:15:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:15,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:15,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:15,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:15:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:15,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:15,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942167233] [2024-09-20 12:15:15,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942167233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:15,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012167834] [2024-09-20 12:15:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:15:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:15,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:15,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:15:15,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 12:15:15,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:15,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 12:15:15,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:16,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012167834] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:16,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:16,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-20 12:15:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106914915] [2024-09-20 12:15:16,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:16,619 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 12:15:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 12:15:16,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:15:16,621 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:17,054 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-09-20 12:15:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:15:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-20 12:15:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:17,056 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:15:17,056 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 12:15:17,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:15:17,058 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:17,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 12:15:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-09-20 12:15:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2024-09-20 12:15:17,072 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2024-09-20 12:15:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:17,072 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2024-09-20 12:15:17,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:17,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2024-09-20 12:15:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:15:17,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:17,074 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:17,091 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 12:15:17,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:15:17,275 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:17,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:17,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1975485178, now seen corresponding path program 5 times [2024-09-20 12:15:17,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:17,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393243813] [2024-09-20 12:15:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:17,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:17,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:17,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:17,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:15:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393243813] [2024-09-20 12:15:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393243813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571442349] [2024-09-20 12:15:17,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:15:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:17,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:17,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:15:17,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 12:15:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:17,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 12:15:17,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:17,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:18,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571442349] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:18,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:18,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 45 [2024-09-20 12:15:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628787342] [2024-09-20 12:15:18,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:18,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 12:15:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 12:15:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 12:15:18,377 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:18,801 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-09-20 12:15:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:15:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-20 12:15:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:18,803 INFO L225 Difference]: With dead ends: 58 [2024-09-20 12:15:18,803 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 12:15:18,804 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:15:18,804 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:18,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 49 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 12:15:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 12:15:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-20 12:15:18,816 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2024-09-20 12:15:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:18,816 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-20 12:15:18,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:18,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-20 12:15:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 12:15:18,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:18,817 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:18,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 12:15:19,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:15:19,018 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1819133756, now seen corresponding path program 6 times [2024-09-20 12:15:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218851663] [2024-09-20 12:15:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:19,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:19,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:19,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:15:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218851663] [2024-09-20 12:15:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218851663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838246261] [2024-09-20 12:15:19,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:15:19,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:19,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:19,337 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:15:19,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 12:15:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:19,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 12:15:19,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:19,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838246261] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:19,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-20 12:15:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182733546] [2024-09-20 12:15:19,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:19,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 12:15:19,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 12:15:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:15:19,948 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:20,306 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-09-20 12:15:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:15:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-20 12:15:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:20,308 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:15:20,308 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 12:15:20,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 12:15:20,310 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:20,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 12:15:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2024-09-20 12:15:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-09-20 12:15:20,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 37 [2024-09-20 12:15:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:20,319 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-09-20 12:15:20,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:20,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-09-20 12:15:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 12:15:20,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:20,320 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:20,333 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:15:20,521 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:15:20,521 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:20,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -475395845, now seen corresponding path program 6 times [2024-09-20 12:15:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646606896] [2024-09-20 12:15:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:20,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:20,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:20,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 12:15:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646606896] [2024-09-20 12:15:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646606896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683099083] [2024-09-20 12:15:20,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:15:20,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:20,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:20,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:15:20,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 12:15:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:20,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 12:15:20,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:21,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:21,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683099083] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:21,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-20 12:15:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084318657] [2024-09-20 12:15:21,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:21,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 12:15:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 12:15:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:15:21,512 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:21,926 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2024-09-20 12:15:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:15:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-20 12:15:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:21,928 INFO L225 Difference]: With dead ends: 59 [2024-09-20 12:15:21,928 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 12:15:21,929 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=3075, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 12:15:21,929 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:21,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 12:15:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-20 12:15:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2024-09-20 12:15:21,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2024-09-20 12:15:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:21,939 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2024-09-20 12:15:21,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:21,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2024-09-20 12:15:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:15:21,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:21,940 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:21,954 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 12:15:22,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:22,142 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:22,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1149616321, now seen corresponding path program 7 times [2024-09-20 12:15:22,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:22,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675484803] [2024-09-20 12:15:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:22,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:22,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:22,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:22,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:15:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:22,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675484803] [2024-09-20 12:15:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675484803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783749787] [2024-09-20 12:15:22,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:15:22,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:22,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:22,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:22,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:15:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:22,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:15:22,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:22,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:23,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783749787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:23,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-20 12:15:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728432824] [2024-09-20 12:15:23,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:23,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 12:15:23,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 12:15:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 12:15:23,268 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:23,822 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-20 12:15:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:15:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-20 12:15:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:23,824 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:15:23,824 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 12:15:23,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 12:15:23,826 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:23,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 12:15:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2024-09-20 12:15:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-09-20 12:15:23,843 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 38 [2024-09-20 12:15:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:23,844 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-09-20 12:15:23,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:23,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-09-20 12:15:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:15:23,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:23,845 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:23,862 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:24,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:24,046 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:24,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1335880383, now seen corresponding path program 7 times [2024-09-20 12:15:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:24,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642202947] [2024-09-20 12:15:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:24,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:24,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:24,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:24,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:15:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:24,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642202947] [2024-09-20 12:15:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642202947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743101104] [2024-09-20 12:15:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:15:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:24,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:15:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:24,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:15:24,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:24,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:25,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743101104] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:25,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:25,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2024-09-20 12:15:25,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920718590] [2024-09-20 12:15:25,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:25,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 12:15:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 12:15:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2143, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 12:15:25,305 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:25,701 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-09-20 12:15:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:15:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-20 12:15:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:25,702 INFO L225 Difference]: With dead ends: 60 [2024-09-20 12:15:25,702 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 12:15:25,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 12:15:25,704 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:25,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:15:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 12:15:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 12:15:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-09-20 12:15:25,712 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2024-09-20 12:15:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:25,713 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-09-20 12:15:25,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:25,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-09-20 12:15:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:15:25,714 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:25,714 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:25,727 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 12:15:25,914 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:25,914 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:25,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash 244399419, now seen corresponding path program 8 times [2024-09-20 12:15:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256584749] [2024-09-20 12:15:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:26,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:26,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:26,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:15:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:26,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256584749] [2024-09-20 12:15:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256584749] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:26,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535518589] [2024-09-20 12:15:26,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:26,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:26,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:15:26,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:26,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:26,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:15:26,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:26,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535518589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:26,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:26,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-20 12:15:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989795996] [2024-09-20 12:15:26,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:26,994 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 12:15:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 12:15:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 12:15:26,995 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:27,445 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2024-09-20 12:15:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:15:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-20 12:15:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:27,446 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:15:27,446 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 12:15:27,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 12:15:27,447 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:27,447 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 12:15:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2024-09-20 12:15:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-20 12:15:27,457 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2024-09-20 12:15:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:27,458 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-20 12:15:27,458 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:27,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-20 12:15:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:15:27,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:27,459 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:27,471 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:27,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:27,662 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:27,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2122483680, now seen corresponding path program 8 times [2024-09-20 12:15:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:27,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611756678] [2024-09-20 12:15:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:27,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:27,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:27,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 12:15:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:27,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611756678] [2024-09-20 12:15:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611756678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:27,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950859974] [2024-09-20 12:15:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:27,961 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:15:28,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:28,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:15:28,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:28,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950859974] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:28,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:28,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-20 12:15:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633357885] [2024-09-20 12:15:28,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:28,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 12:15:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 12:15:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 12:15:28,719 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:29,102 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2024-09-20 12:15:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:15:29,103 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-20 12:15:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:29,104 INFO L225 Difference]: With dead ends: 61 [2024-09-20 12:15:29,104 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 12:15:29,105 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 12:15:29,105 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:29,105 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 12:15:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 12:15:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-09-20 12:15:29,115 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2024-09-20 12:15:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:29,115 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-09-20 12:15:29,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:29,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-09-20 12:15:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:15:29,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:29,117 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:29,134 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 12:15:29,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:15:29,317 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:29,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 694635306, now seen corresponding path program 9 times [2024-09-20 12:15:29,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:29,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203074767] [2024-09-20 12:15:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:29,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:29,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:29,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:15:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203074767] [2024-09-20 12:15:29,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203074767] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391805960] [2024-09-20 12:15:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:29,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:29,706 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:29,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:15:29,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:15:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:29,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:15:29,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:30,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:30,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391805960] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:30,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:30,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-20 12:15:30,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497646471] [2024-09-20 12:15:30,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:30,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 12:15:30,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:30,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 12:15:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 12:15:30,590 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:31,085 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-09-20 12:15:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:15:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-20 12:15:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:31,087 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:15:31,087 INFO L226 Difference]: Without dead ends: 56 [2024-09-20 12:15:31,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 12:15:31,089 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:31,089 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 43 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-20 12:15:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-20 12:15:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2024-09-20 12:15:31,120 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2024-09-20 12:15:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:31,120 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2024-09-20 12:15:31,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:31,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2024-09-20 12:15:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:15:31,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:31,121 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:31,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:15:31,321 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:31,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:31,322 INFO L85 PathProgramCache]: Analyzing trace with hash -119436570, now seen corresponding path program 9 times [2024-09-20 12:15:31,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:31,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976821452] [2024-09-20 12:15:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:31,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:31,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:31,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:31,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:15:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976821452] [2024-09-20 12:15:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976821452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322141601] [2024-09-20 12:15:31,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:31,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:31,710 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:31,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:15:31,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:15:31,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:31,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:15:31,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:32,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322141601] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:32,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:32,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 57 [2024-09-20 12:15:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947134001] [2024-09-20 12:15:32,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:32,614 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-20 12:15:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:32,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-20 12:15:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 12:15:32,616 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:33,102 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-09-20 12:15:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:15:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-20 12:15:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:33,104 INFO L225 Difference]: With dead ends: 62 [2024-09-20 12:15:33,104 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 12:15:33,104 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=909, Invalid=5097, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 12:15:33,105 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:33,105 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 12:15:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 12:15:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2024-09-20 12:15:33,115 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2024-09-20 12:15:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:33,115 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2024-09-20 12:15:33,116 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.280701754385965) internal successors, (73), 56 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:33,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2024-09-20 12:15:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:15:33,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:33,116 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:33,133 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 12:15:33,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:15:33,321 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:33,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1635413724, now seen corresponding path program 10 times [2024-09-20 12:15:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868348589] [2024-09-20 12:15:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:33,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:33,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:33,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:15:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:33,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868348589] [2024-09-20 12:15:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868348589] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202407891] [2024-09-20 12:15:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:15:33,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:33,696 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:33,697 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:15:33,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:15:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:33,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 12:15:33,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:34,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202407891] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:34,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:34,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-20 12:15:34,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708692366] [2024-09-20 12:15:34,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:34,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 12:15:34,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 12:15:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:15:34,512 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:35,004 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2024-09-20 12:15:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:15:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-20 12:15:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:35,006 INFO L225 Difference]: With dead ends: 69 [2024-09-20 12:15:35,006 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 12:15:35,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 12:15:35,007 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:35,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 12:15:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-09-20 12:15:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-20 12:15:35,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2024-09-20 12:15:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:35,017 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-20 12:15:35,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:35,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-20 12:15:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:15:35,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:35,018 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:35,034 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 12:15:35,221 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:15:35,221 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1227536155, now seen corresponding path program 10 times [2024-09-20 12:15:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352411399] [2024-09-20 12:15:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:35,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:35,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:35,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:15:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352411399] [2024-09-20 12:15:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352411399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904178884] [2024-09-20 12:15:35,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:15:35,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:35,572 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:35,573 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:15:35,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:15:35,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:35,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 12:15:35,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:35,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904178884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:36,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-20 12:15:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065618708] [2024-09-20 12:15:36,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:36,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 12:15:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 12:15:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2563, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:15:36,510 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:36,964 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2024-09-20 12:15:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 12:15:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-20 12:15:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:36,965 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:15:36,965 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 12:15:36,966 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=4929, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 12:15:36,966 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:36,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 12:15:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 12:15:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-09-20 12:15:36,977 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 41 [2024-09-20 12:15:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:36,977 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-09-20 12:15:36,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:36,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-09-20 12:15:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:15:36,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:36,978 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:36,992 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 12:15:37,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 12:15:37,179 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:37,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1744997279, now seen corresponding path program 11 times [2024-09-20 12:15:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:37,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285811906] [2024-09-20 12:15:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:37,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:37,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:37,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:15:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:37,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285811906] [2024-09-20 12:15:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285811906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306293600] [2024-09-20 12:15:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:15:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:37,586 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:37,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 12:15:37,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 12:15:37,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:37,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 12:15:37,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:38,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306293600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:38,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:38,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-20 12:15:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883763189] [2024-09-20 12:15:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:38,629 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 12:15:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 12:15:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 12:15:38,631 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:39,154 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-09-20 12:15:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:15:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-20 12:15:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:39,156 INFO L225 Difference]: With dead ends: 69 [2024-09-20 12:15:39,156 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 12:15:39,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 12:15:39,157 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:39,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 12:15:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-20 12:15:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2024-09-20 12:15:39,169 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 42 [2024-09-20 12:15:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:39,170 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2024-09-20 12:15:39,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:39,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2024-09-20 12:15:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:15:39,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:39,170 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:39,183 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 12:15:39,371 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 12:15:39,371 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:39,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2010460257, now seen corresponding path program 11 times [2024-09-20 12:15:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:39,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332530481] [2024-09-20 12:15:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:39,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:39,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:39,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:15:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332530481] [2024-09-20 12:15:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332530481] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24383238] [2024-09-20 12:15:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:15:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:39,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:39,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 12:15:39,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 12:15:39,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:39,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 12:15:39,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:40,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24383238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:40,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2024-09-20 12:15:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439526187] [2024-09-20 12:15:40,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:40,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 12:15:40,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:40,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 12:15:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3283, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 12:15:40,757 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:41,317 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2024-09-20 12:15:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:15:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-09-20 12:15:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:41,318 INFO L225 Difference]: With dead ends: 64 [2024-09-20 12:15:41,318 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 12:15:41,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1105, Invalid=6205, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 12:15:41,320 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:41,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 12:15:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-20 12:15:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-09-20 12:15:41,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2024-09-20 12:15:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:41,338 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-09-20 12:15:41,338 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:41,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-09-20 12:15:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:15:41,339 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:41,339 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:41,351 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-20 12:15:41,539 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 12:15:41,540 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:41,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1050813403, now seen corresponding path program 12 times [2024-09-20 12:15:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298969483] [2024-09-20 12:15:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:15:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:41,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298969483] [2024-09-20 12:15:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298969483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:41,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281651825] [2024-09-20 12:15:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:15:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:41,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:41,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:41,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 12:15:41,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 12:15:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:41,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 12:15:41,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:42,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:42,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281651825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:42,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:42,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-20 12:15:42,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642494223] [2024-09-20 12:15:42,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:42,854 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 12:15:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:42,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 12:15:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:15:42,855 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:43,508 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-09-20 12:15:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:15:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-20 12:15:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:43,510 INFO L225 Difference]: With dead ends: 71 [2024-09-20 12:15:43,510 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 12:15:43,511 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 12:15:43,511 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:43,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 67 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 12:15:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-09-20 12:15:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-09-20 12:15:43,528 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2024-09-20 12:15:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:43,529 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-09-20 12:15:43,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:43,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-09-20 12:15:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:15:43,529 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:43,530 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:43,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 12:15:43,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:43,730 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:43,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1465138944, now seen corresponding path program 12 times [2024-09-20 12:15:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919394192] [2024-09-20 12:15:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:43,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:43,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:43,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:15:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:44,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919394192] [2024-09-20 12:15:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919394192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:44,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893399812] [2024-09-20 12:15:44,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:15:44,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:44,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:44,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:44,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 12:15:44,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 12:15:44,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:44,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 12:15:44,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:44,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:45,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893399812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:45,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:45,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 62 [2024-09-20 12:15:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455882052] [2024-09-20 12:15:45,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:45,079 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 12:15:45,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:45,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 12:15:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:15:45,081 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:45,620 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2024-09-20 12:15:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:15:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-20 12:15:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:45,621 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:15:45,621 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 12:15:45,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1122, Invalid=6018, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 12:15:45,623 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:45,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 12:15:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 12:15:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-09-20 12:15:45,633 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2024-09-20 12:15:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:45,633 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-09-20 12:15:45,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:45,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-09-20 12:15:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:15:45,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:45,634 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:45,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:45,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:45,835 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:45,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash -76334966, now seen corresponding path program 13 times [2024-09-20 12:15:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:45,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317253926] [2024-09-20 12:15:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:45,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:45,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:46,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:15:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317253926] [2024-09-20 12:15:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317253926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:46,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986787692] [2024-09-20 12:15:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:15:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:46,252 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 12:15:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:46,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:15:46,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:46,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:47,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986787692] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:47,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-20 12:15:47,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750512820] [2024-09-20 12:15:47,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:47,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 12:15:47,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:47,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 12:15:47,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 12:15:47,396 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:48,065 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2024-09-20 12:15:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:15:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-20 12:15:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:48,071 INFO L225 Difference]: With dead ends: 71 [2024-09-20 12:15:48,071 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 12:15:48,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 12:15:48,072 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:48,072 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 12:15:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-09-20 12:15:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2024-09-20 12:15:48,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 44 [2024-09-20 12:15:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:48,090 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2024-09-20 12:15:48,092 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:48,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2024-09-20 12:15:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 12:15:48,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:48,093 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:48,112 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 12:15:48,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:48,294 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -694353722, now seen corresponding path program 13 times [2024-09-20 12:15:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127315356] [2024-09-20 12:15:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:48,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:48,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:48,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:48,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:15:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:48,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:48,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127315356] [2024-09-20 12:15:48,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127315356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:48,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297135667] [2024-09-20 12:15:48,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:15:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:48,727 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:48,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 12:15:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:48,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:15:48,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:49,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297135667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:49,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 69 [2024-09-20 12:15:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848925259] [2024-09-20 12:15:49,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:49,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 12:15:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 12:15:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 12:15:49,805 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:50,537 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-09-20 12:15:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:15:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-20 12:15:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:50,538 INFO L225 Difference]: With dead ends: 66 [2024-09-20 12:15:50,538 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 12:15:50,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1321, Invalid=7421, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 12:15:50,540 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:50,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 12:15:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 12:15:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-09-20 12:15:50,552 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2024-09-20 12:15:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:50,552 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-09-20 12:15:50,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 68 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:50,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-09-20 12:15:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 12:15:50,553 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:50,553 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:50,567 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 12:15:50,754 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 12:15:50,754 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:50,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1951796860, now seen corresponding path program 14 times [2024-09-20 12:15:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:50,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987455684] [2024-09-20 12:15:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:50,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:50,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:50,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:15:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987455684] [2024-09-20 12:15:51,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987455684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:51,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167068962] [2024-09-20 12:15:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:51,237 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:51,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 12:15:51,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:51,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 12:15:51,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:51,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:52,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167068962] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:52,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:52,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-20 12:15:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096514848] [2024-09-20 12:15:52,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:52,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 12:15:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 12:15:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 12:15:52,267 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:52,882 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-09-20 12:15:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:15:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-20 12:15:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:52,884 INFO L225 Difference]: With dead ends: 73 [2024-09-20 12:15:52,884 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:15:52,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 12:15:52,886 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:52,886 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:15:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:15:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-09-20 12:15:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-09-20 12:15:52,897 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 45 [2024-09-20 12:15:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:52,898 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-09-20 12:15:52,898 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:52,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-09-20 12:15:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 12:15:52,899 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:52,899 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:52,914 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-20 12:15:53,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 12:15:53,103 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:53,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash 584973627, now seen corresponding path program 14 times [2024-09-20 12:15:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137936270] [2024-09-20 12:15:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:53,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:53,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:53,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:15:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137936270] [2024-09-20 12:15:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137936270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808441321] [2024-09-20 12:15:53,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:15:53,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:53,510 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:53,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 12:15:53,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:15:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:53,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 12:15:53,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:53,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:54,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808441321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:54,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:54,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 68 [2024-09-20 12:15:54,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482118060] [2024-09-20 12:15:54,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:54,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 12:15:54,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 12:15:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3795, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 12:15:54,560 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:55,227 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2024-09-20 12:15:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 12:15:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-20 12:15:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:55,240 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:15:55,242 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 12:15:55,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1341, Invalid=7215, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 12:15:55,246 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:55,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 70 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 12:15:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-20 12:15:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-09-20 12:15:55,275 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 45 [2024-09-20 12:15:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:55,276 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-09-20 12:15:55,276 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:55,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-09-20 12:15:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:15:55,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:55,279 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:55,312 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 12:15:55,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-20 12:15:55,480 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:55,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1332027393, now seen corresponding path program 15 times [2024-09-20 12:15:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349403705] [2024-09-20 12:15:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:55,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:55,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:55,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:55,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:15:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:55,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349403705] [2024-09-20 12:15:55,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349403705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246881948] [2024-09-20 12:15:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:55,934 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:55,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 12:15:56,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 12:15:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:56,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:15:56,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:56,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:15:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246881948] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:15:57,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:15:57,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-20 12:15:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836392587] [2024-09-20 12:15:57,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:15:57,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 12:15:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:15:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 12:15:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 12:15:57,156 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:15:57,858 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2024-09-20 12:15:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:15:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-20 12:15:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:15:57,860 INFO L225 Difference]: With dead ends: 73 [2024-09-20 12:15:57,860 INFO L226 Difference]: Without dead ends: 62 [2024-09-20 12:15:57,860 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 12:15:57,861 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:15:57,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:15:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-20 12:15:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-09-20 12:15:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:15:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2024-09-20 12:15:57,872 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 46 [2024-09-20 12:15:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:15:57,872 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2024-09-20 12:15:57,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:15:57,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2024-09-20 12:15:57,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:15:57,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:15:57,873 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:15:57,891 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-20 12:15:58,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 12:15:58,078 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:15:58,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:15:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1719770239, now seen corresponding path program 15 times [2024-09-20 12:15:58,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:15:58,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476535406] [2024-09-20 12:15:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:15:58,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:15:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:58,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:15:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:58,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:15:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:58,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:15:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:15:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:15:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476535406] [2024-09-20 12:15:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476535406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:15:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758229097] [2024-09-20 12:15:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:15:58,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:15:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:15:58,595 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:15:58,597 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 12:15:58,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 12:15:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:15:58,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:15:58,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:15:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:15:59,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758229097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:00,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 75 [2024-09-20 12:16:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271357588] [2024-09-20 12:16:00,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:00,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-20 12:16:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-20 12:16:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 12:16:00,018 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:00,829 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-09-20 12:16:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:16:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-09-20 12:16:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:00,830 INFO L225 Difference]: With dead ends: 68 [2024-09-20 12:16:00,830 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 12:16:00,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1557, Invalid=8745, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 12:16:00,832 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:00,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 12:16:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-20 12:16:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-09-20 12:16:00,846 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 46 [2024-09-20 12:16:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:00,846 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-09-20 12:16:00,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:00,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-09-20 12:16:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 12:16:00,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:00,847 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:00,867 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-20 12:16:01,048 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 12:16:01,048 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:01,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:01,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1395555717, now seen corresponding path program 16 times [2024-09-20 12:16:01,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:01,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498334] [2024-09-20 12:16:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:01,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:01,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:01,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:16:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:01,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498334] [2024-09-20 12:16:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498334] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666655267] [2024-09-20 12:16:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:16:01,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:01,545 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 12:16:01,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:16:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:01,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 12:16:01,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:02,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666655267] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:02,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:02,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-20 12:16:02,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783769064] [2024-09-20 12:16:02,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:02,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 12:16:02,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 12:16:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 12:16:02,831 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:03,526 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-09-20 12:16:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:16:03,527 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-20 12:16:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:03,528 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:16:03,528 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 12:16:03,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 12:16:03,529 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:03,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 12:16:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-09-20 12:16:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-09-20 12:16:03,540 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 47 [2024-09-20 12:16:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:03,540 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-09-20 12:16:03,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:03,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-09-20 12:16:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 12:16:03,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:03,541 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:03,554 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:03,742 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 12:16:03,742 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:03,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1138167328, now seen corresponding path program 16 times [2024-09-20 12:16:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767754651] [2024-09-20 12:16:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:03,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:03,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:03,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 12:16:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767754651] [2024-09-20 12:16:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767754651] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:04,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799843885] [2024-09-20 12:16:04,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:16:04,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:04,225 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:04,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-20 12:16:04,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:16:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:04,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 12:16:04,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:04,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799843885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:05,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 74 [2024-09-20 12:16:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566421414] [2024-09-20 12:16:05,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:05,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 12:16:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 12:16:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 12:16:05,399 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:06,003 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2024-09-20 12:16:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:16:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-20 12:16:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:06,005 INFO L225 Difference]: With dead ends: 69 [2024-09-20 12:16:06,005 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 12:16:06,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1580, Invalid=8520, Unknown=0, NotChecked=0, Total=10100 [2024-09-20 12:16:06,007 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:06,008 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 12:16:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 12:16:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-09-20 12:16:06,024 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2024-09-20 12:16:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:06,024 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-09-20 12:16:06,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:06,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-09-20 12:16:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 12:16:06,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:06,026 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:06,044 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-20 12:16:06,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-20 12:16:06,231 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:06,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1395633642, now seen corresponding path program 17 times [2024-09-20 12:16:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461974386] [2024-09-20 12:16:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:06,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:06,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:06,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:06,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:16:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:06,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461974386] [2024-09-20 12:16:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461974386] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426954710] [2024-09-20 12:16:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:16:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:06,767 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:06,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-20 12:16:06,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 12:16:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:06,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:16:06,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:07,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426954710] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:08,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:08,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-20 12:16:08,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104701226] [2024-09-20 12:16:08,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:08,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-20 12:16:08,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-20 12:16:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 12:16:08,225 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:08,907 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2024-09-20 12:16:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:16:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-20 12:16:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:08,908 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:16:08,908 INFO L226 Difference]: Without dead ends: 64 [2024-09-20 12:16:08,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 12:16:08,909 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:08,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-20 12:16:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-20 12:16:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-09-20 12:16:08,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2024-09-20 12:16:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:08,922 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-09-20 12:16:08,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:08,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-09-20 12:16:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 12:16:08,923 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:08,923 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:08,936 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-20 12:16:09,123 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-20 12:16:09,124 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:09,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 206102182, now seen corresponding path program 17 times [2024-09-20 12:16:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531016383] [2024-09-20 12:16:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:09,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:09,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:09,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:16:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531016383] [2024-09-20 12:16:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531016383] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968484986] [2024-09-20 12:16:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:16:09,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:09,620 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:09,621 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-20 12:16:09,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 12:16:09,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:09,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:16:09,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:10,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968484986] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:10,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 81 [2024-09-20 12:16:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546143701] [2024-09-20 12:16:10,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:10,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-09-20 12:16:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-09-20 12:16:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=5443, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 12:16:10,962 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:11,630 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-09-20 12:16:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:16:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-20 12:16:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:11,632 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:16:11,632 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 12:16:11,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1813, Invalid=10177, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 12:16:11,634 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:11,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 12:16:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-20 12:16:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-09-20 12:16:11,654 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 48 [2024-09-20 12:16:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:11,654 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-09-20 12:16:11,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 80 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:11,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-09-20 12:16:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 12:16:11,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:11,655 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:11,671 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:11,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:11,856 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:11,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 118315492, now seen corresponding path program 18 times [2024-09-20 12:16:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:11,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371544356] [2024-09-20 12:16:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:11,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:11,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:12,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:16:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:12,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371544356] [2024-09-20 12:16:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371544356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093915318] [2024-09-20 12:16:12,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:16:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:12,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:12,286 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:12,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-20 12:16:12,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 12:16:12,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:12,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:16:12,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:12,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:13,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093915318] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:13,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:13,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-20 12:16:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105075366] [2024-09-20 12:16:13,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:13,537 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-20 12:16:13,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-20 12:16:13,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 12:16:13,538 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:14,173 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-09-20 12:16:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:16:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-20 12:16:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:14,175 INFO L225 Difference]: With dead ends: 77 [2024-09-20 12:16:14,175 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:16:14,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 12:16:14,177 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:14,177 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:16:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2024-09-20 12:16:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-09-20 12:16:14,192 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2024-09-20 12:16:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:14,192 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-09-20 12:16:14,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:14,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-09-20 12:16:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 12:16:14,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:14,193 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:14,207 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:14,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:14,394 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:14,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1565664421, now seen corresponding path program 18 times [2024-09-20 12:16:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:14,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347505691] [2024-09-20 12:16:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:14,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:14,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:14,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 12:16:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:14,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:14,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347505691] [2024-09-20 12:16:14,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347505691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:14,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515515358] [2024-09-20 12:16:14,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:16:14,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:14,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:14,830 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:14,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-20 12:16:14,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 12:16:14,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:14,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:16:14,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:15,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:16,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515515358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:16,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:16,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 80 [2024-09-20 12:16:16,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533612953] [2024-09-20 12:16:16,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:16,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-09-20 12:16:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-09-20 12:16:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=5267, Unknown=0, NotChecked=0, Total=6320 [2024-09-20 12:16:16,118 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:16,894 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-09-20 12:16:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 12:16:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-20 12:16:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:16,896 INFO L225 Difference]: With dead ends: 71 [2024-09-20 12:16:16,896 INFO L226 Difference]: Without dead ends: 59 [2024-09-20 12:16:16,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1839, Invalid=9933, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 12:16:16,897 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:16,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-20 12:16:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-20 12:16:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-09-20 12:16:16,913 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2024-09-20 12:16:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:16,913 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-09-20 12:16:16,915 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:16,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-09-20 12:16:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 12:16:16,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:16,916 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:16,935 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-20 12:16:17,116 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:17,117 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:17,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1081000865, now seen corresponding path program 19 times [2024-09-20 12:16:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075334810] [2024-09-20 12:16:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:17,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:17,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:17,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:16:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:17,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075334810] [2024-09-20 12:16:17,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075334810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269578362] [2024-09-20 12:16:17,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:16:17,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:17,566 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:17,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-20 12:16:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:17,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 12:16:17,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:18,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269578362] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:19,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:19,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-20 12:16:19,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323032678] [2024-09-20 12:16:19,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:19,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-20 12:16:19,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-20 12:16:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 12:16:19,181 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:19,989 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2024-09-20 12:16:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 12:16:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-20 12:16:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:19,990 INFO L225 Difference]: With dead ends: 77 [2024-09-20 12:16:19,990 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 12:16:19,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-20 12:16:19,992 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:19,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 12:16:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-09-20 12:16:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2024-09-20 12:16:20,009 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 50 [2024-09-20 12:16:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:20,009 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2024-09-20 12:16:20,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:20,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2024-09-20 12:16:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 12:16:20,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:20,011 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:20,025 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:20,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-20 12:16:20,215 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1787145889, now seen corresponding path program 19 times [2024-09-20 12:16:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88786560] [2024-09-20 12:16:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:20,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:20,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:20,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:16:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:20,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:20,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88786560] [2024-09-20 12:16:20,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88786560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:20,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376744781] [2024-09-20 12:16:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:16:20,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:20,713 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:20,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-20 12:16:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:20,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 12:16:20,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:21,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:22,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376744781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:22,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:22,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 87 [2024-09-20 12:16:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128794123] [2024-09-20 12:16:22,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:22,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-20 12:16:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:22,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-20 12:16:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=6283, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 12:16:22,136 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:22,951 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-09-20 12:16:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 12:16:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-09-20 12:16:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:22,953 INFO L225 Difference]: With dead ends: 72 [2024-09-20 12:16:22,953 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:16:22,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2089, Invalid=11717, Unknown=0, NotChecked=0, Total=13806 [2024-09-20 12:16:22,955 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:22,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:16:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 12:16:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-20 12:16:22,974 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 50 [2024-09-20 12:16:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:22,974 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-20 12:16:22,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 86 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:22,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-20 12:16:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:16:22,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:22,976 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:22,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-20 12:16:23,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-20 12:16:23,176 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:23,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1938905371, now seen corresponding path program 20 times [2024-09-20 12:16:23,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:23,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852687656] [2024-09-20 12:16:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:23,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:23,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:23,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:16:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:23,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:23,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852687656] [2024-09-20 12:16:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852687656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:23,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964057222] [2024-09-20 12:16:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:16:23,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:23,693 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:23,694 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-20 12:16:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:16:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:23,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 12:16:23,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:24,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964057222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:25,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-20 12:16:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835615941] [2024-09-20 12:16:25,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:25,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 12:16:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 12:16:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 12:16:25,086 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:25,837 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-09-20 12:16:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 12:16:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-20 12:16:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:25,838 INFO L225 Difference]: With dead ends: 79 [2024-09-20 12:16:25,839 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 12:16:25,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5974 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 12:16:25,840 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:25,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 12:16:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-09-20 12:16:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-09-20 12:16:25,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2024-09-20 12:16:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:25,857 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-09-20 12:16:25,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:25,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-09-20 12:16:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:16:25,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:25,858 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:25,872 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-20 12:16:26,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:26,059 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:26,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash 202050240, now seen corresponding path program 20 times [2024-09-20 12:16:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:26,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075688513] [2024-09-20 12:16:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:26,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:26,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:26,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:26,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-20 12:16:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075688513] [2024-09-20 12:16:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075688513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240081443] [2024-09-20 12:16:26,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:16:26,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:26,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:26,520 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-20 12:16:26,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:16:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:26,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 12:16:26,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:27,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:27,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240081443] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:27,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 86 [2024-09-20 12:16:27,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422215194] [2024-09-20 12:16:27,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:27,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-20 12:16:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-20 12:16:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2024-09-20 12:16:27,953 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:28,688 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2024-09-20 12:16:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 12:16:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-20 12:16:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:28,690 INFO L225 Difference]: With dead ends: 73 [2024-09-20 12:16:28,690 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 12:16:28,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2118, Invalid=11454, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 12:16:28,692 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:28,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 12:16:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-09-20 12:16:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-09-20 12:16:28,708 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 51 [2024-09-20 12:16:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:28,708 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-09-20 12:16:28,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:28,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-09-20 12:16:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 12:16:28,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:28,710 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:28,728 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-20 12:16:28,910 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:28,910 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:28,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1684712266, now seen corresponding path program 21 times [2024-09-20 12:16:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667469173] [2024-09-20 12:16:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:29,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:29,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:29,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:16:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667469173] [2024-09-20 12:16:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667469173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505162958] [2024-09-20 12:16:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:16:29,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:29,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:29,466 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:29,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-20 12:16:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:16:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:29,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 12:16:29,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:30,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505162958] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:31,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:31,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-20 12:16:31,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592338335] [2024-09-20 12:16:31,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:31,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-20 12:16:31,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-20 12:16:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 12:16:31,211 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:32,134 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2024-09-20 12:16:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:16:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-20 12:16:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:32,135 INFO L225 Difference]: With dead ends: 79 [2024-09-20 12:16:32,136 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 12:16:32,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6906 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 12:16:32,138 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:32,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 58 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 12:16:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-09-20 12:16:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-09-20 12:16:32,158 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 52 [2024-09-20 12:16:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:32,158 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-09-20 12:16:32,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:32,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-09-20 12:16:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 12:16:32,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:32,159 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:32,174 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-20 12:16:32,359 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-20 12:16:32,360 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:32,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1027286150, now seen corresponding path program 21 times [2024-09-20 12:16:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:32,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578018598] [2024-09-20 12:16:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:32,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:32,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:32,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:16:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:32,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578018598] [2024-09-20 12:16:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578018598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489485319] [2024-09-20 12:16:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:16:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:32,958 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:32,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-20 12:16:33,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:16:33,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:33,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 12:16:33,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:33,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:34,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489485319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:34,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:34,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 93 [2024-09-20 12:16:34,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108000472] [2024-09-20 12:16:34,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:34,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-09-20 12:16:34,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-09-20 12:16:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=7183, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 12:16:34,596 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:35,416 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-09-20 12:16:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:16:35,416 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-20 12:16:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:35,417 INFO L225 Difference]: With dead ends: 74 [2024-09-20 12:16:35,417 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 12:16:35,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2385, Invalid=13365, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 12:16:35,418 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:35,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 12:16:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-20 12:16:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-09-20 12:16:35,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 52 [2024-09-20 12:16:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:35,432 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-09-20 12:16:35,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:35,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-09-20 12:16:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 12:16:35,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:35,432 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:35,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:35,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-20 12:16:35,633 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:35,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1497221700, now seen corresponding path program 22 times [2024-09-20 12:16:35,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:35,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830018869] [2024-09-20 12:16:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:35,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:35,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:35,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:35,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:16:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:36,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830018869] [2024-09-20 12:16:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830018869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599734541] [2024-09-20 12:16:36,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:16:36,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:36,157 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:36,158 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-20 12:16:36,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:16:36,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:36,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 12:16:36,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:36,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599734541] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:37,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-20 12:16:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615712495] [2024-09-20 12:16:37,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:37,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-20 12:16:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-20 12:16:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 12:16:37,746 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:38,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:38,589 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-09-20 12:16:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:16:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-20 12:16:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:38,590 INFO L225 Difference]: With dead ends: 81 [2024-09-20 12:16:38,590 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 12:16:38,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-20 12:16:38,592 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:38,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 12:16:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-09-20 12:16:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-09-20 12:16:38,606 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2024-09-20 12:16:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:38,606 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-09-20 12:16:38,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:38,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-09-20 12:16:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 12:16:38,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:38,607 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:38,627 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:38,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-20 12:16:38,812 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:38,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1878765189, now seen corresponding path program 22 times [2024-09-20 12:16:38,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:38,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928058783] [2024-09-20 12:16:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:38,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:38,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:39,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 12:16:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928058783] [2024-09-20 12:16:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928058783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604807352] [2024-09-20 12:16:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:16:39,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:39,291 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:39,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-20 12:16:39,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:16:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:39,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 12:16:39,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:39,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604807352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:40,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 92 [2024-09-20 12:16:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209754018] [2024-09-20 12:16:40,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:40,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-20 12:16:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-20 12:16:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=6979, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 12:16:40,919 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:41,700 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2024-09-20 12:16:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:16:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-20 12:16:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:41,701 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:16:41,702 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:16:41,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6939 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2417, Invalid=13083, Unknown=0, NotChecked=0, Total=15500 [2024-09-20 12:16:41,704 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:41,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:16:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 12:16:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-09-20 12:16:41,720 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 53 [2024-09-20 12:16:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:41,720 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-09-20 12:16:41,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:41,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-09-20 12:16:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 12:16:41,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:41,721 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:41,734 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-20 12:16:41,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:41,922 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:41,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash 877420353, now seen corresponding path program 23 times [2024-09-20 12:16:41,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65115013] [2024-09-20 12:16:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:42,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:42,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:42,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:16:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:42,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65115013] [2024-09-20 12:16:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65115013] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:42,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032210776] [2024-09-20 12:16:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:16:42,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:42,576 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:42,577 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-20 12:16:42,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 12:16:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:42,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 12:16:42,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:43,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032210776] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:44,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:44,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-20 12:16:44,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757319984] [2024-09-20 12:16:44,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:44,436 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-20 12:16:44,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-20 12:16:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 12:16:44,438 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:45,344 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-09-20 12:16:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 12:16:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-20 12:16:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:45,345 INFO L225 Difference]: With dead ends: 81 [2024-09-20 12:16:45,345 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 12:16:45,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7975 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 12:16:45,346 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:45,346 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 46 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 12:16:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-09-20 12:16:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2024-09-20 12:16:45,360 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 54 [2024-09-20 12:16:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:45,360 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2024-09-20 12:16:45,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:45,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2024-09-20 12:16:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 12:16:45,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:45,361 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:45,374 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-20 12:16:45,562 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:45,562 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:45,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash 898961857, now seen corresponding path program 23 times [2024-09-20 12:16:45,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:45,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591615080] [2024-09-20 12:16:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:45,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:45,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:45,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:45,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:16:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591615080] [2024-09-20 12:16:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591615080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306971291] [2024-09-20 12:16:46,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:16:46,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:46,151 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:46,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-20 12:16:46,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 12:16:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:46,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 12:16:46,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:46,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306971291] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:47,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:47,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 99 [2024-09-20 12:16:47,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316901157] [2024-09-20 12:16:47,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:47,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-09-20 12:16:47,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-09-20 12:16:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=8143, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 12:16:47,952 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:48,880 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2024-09-20 12:16:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 12:16:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2024-09-20 12:16:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:48,882 INFO L225 Difference]: With dead ends: 76 [2024-09-20 12:16:48,882 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:16:48,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7931 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=15121, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 12:16:48,884 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:48,884 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 55 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:16:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-20 12:16:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2024-09-20 12:16:48,905 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 54 [2024-09-20 12:16:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:48,906 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2024-09-20 12:16:48,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 98 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:48,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2024-09-20 12:16:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 12:16:48,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:48,907 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:48,922 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-20 12:16:49,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:49,108 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:49,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1087612859, now seen corresponding path program 24 times [2024-09-20 12:16:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725145589] [2024-09-20 12:16:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:49,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:49,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:49,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:16:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725145589] [2024-09-20 12:16:49,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725145589] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427378064] [2024-09-20 12:16:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:16:49,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:49,730 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:49,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-20 12:16:49,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-20 12:16:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:49,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 12:16:49,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:50,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:51,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427378064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:51,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:51,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-20 12:16:51,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494524044] [2024-09-20 12:16:51,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:51,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-20 12:16:51,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-20 12:16:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 12:16:51,479 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:52,410 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-09-20 12:16:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 12:16:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-20 12:16:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:52,411 INFO L225 Difference]: With dead ends: 83 [2024-09-20 12:16:52,411 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 12:16:52,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7899 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-20 12:16:52,413 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:52,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 58 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 12:16:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-09-20 12:16:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-09-20 12:16:52,431 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2024-09-20 12:16:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:52,432 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-09-20 12:16:52,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:52,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-09-20 12:16:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 12:16:52,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:52,433 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:52,452 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:52,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-09-20 12:16:52,633 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:52,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1561850976, now seen corresponding path program 24 times [2024-09-20 12:16:52,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:52,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348566524] [2024-09-20 12:16:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:52,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:52,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:52,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 12:16:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:53,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348566524] [2024-09-20 12:16:53,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348566524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:53,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770452486] [2024-09-20 12:16:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:16:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:53,199 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-20 12:16:53,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-20 12:16:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:16:53,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 12:16:53,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:53,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770452486] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:54,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:54,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 98 [2024-09-20 12:16:54,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550612683] [2024-09-20 12:16:54,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:54,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-09-20 12:16:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:54,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-09-20 12:16:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=7925, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 12:16:54,964 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:55,862 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-09-20 12:16:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 12:16:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-20 12:16:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:55,863 INFO L225 Difference]: With dead ends: 77 [2024-09-20 12:16:55,863 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 12:16:55,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7864 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2736, Invalid=14820, Unknown=0, NotChecked=0, Total=17556 [2024-09-20 12:16:55,866 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:55,866 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:16:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 12:16:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-20 12:16:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-09-20 12:16:55,890 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2024-09-20 12:16:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:55,890 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-09-20 12:16:55,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:55,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-09-20 12:16:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 12:16:55,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:55,891 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:55,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-20 12:16:56,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-09-20 12:16:56,092 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:16:56,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1064448170, now seen corresponding path program 25 times [2024-09-20 12:16:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:16:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336405500] [2024-09-20 12:16:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:16:56,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:16:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:56,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:16:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:56,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:16:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:56,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:16:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:56,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:16:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336405500] [2024-09-20 12:16:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336405500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:16:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732468659] [2024-09-20 12:16:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:16:56,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:16:56,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:16:56,732 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:16:56,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-20 12:16:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:16:56,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 12:16:56,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:16:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:57,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:16:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:16:58,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732468659] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:16:58,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:16:58,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-20 12:16:58,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768406969] [2024-09-20 12:16:58,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:16:58,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-20 12:16:58,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:16:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-20 12:16:58,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:16:58,849 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:16:59,803 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-20 12:16:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 12:16:59,803 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-20 12:16:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:16:59,804 INFO L225 Difference]: With dead ends: 83 [2024-09-20 12:16:59,804 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 12:16:59,806 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8967 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-20 12:16:59,806 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:16:59,807 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:16:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 12:16:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2024-09-20 12:16:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:16:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-09-20 12:16:59,832 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 56 [2024-09-20 12:16:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:16:59,832 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-09-20 12:16:59,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:16:59,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:16:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-09-20 12:16:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 12:16:59,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:16:59,833 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:16:59,847 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-20 12:17:00,033 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:00,033 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:00,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash 659149414, now seen corresponding path program 25 times [2024-09-20 12:17:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843360607] [2024-09-20 12:17:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:00,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:00,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:00,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:17:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:00,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:00,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843360607] [2024-09-20 12:17:00,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843360607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:00,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46928957] [2024-09-20 12:17:00,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:17:00,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:00,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:00,687 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:00,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-20 12:17:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:00,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 12:17:00,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:01,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 105 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:02,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46928957] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:02,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:02,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 105 [2024-09-20 12:17:02,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027335461] [2024-09-20 12:17:02,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:02,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-09-20 12:17:02,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-09-20 12:17:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1757, Invalid=9163, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:17:02,791 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:03,789 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2024-09-20 12:17:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 12:17:03,789 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-20 12:17:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:03,790 INFO L225 Difference]: With dead ends: 78 [2024-09-20 12:17:03,790 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 12:17:03,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9028 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3037, Invalid=16985, Unknown=0, NotChecked=0, Total=20022 [2024-09-20 12:17:03,791 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:03,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 12:17:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 12:17:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-09-20 12:17:03,806 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 56 [2024-09-20 12:17:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:03,807 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-09-20 12:17:03,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 104 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:03,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-09-20 12:17:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 12:17:03,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:03,808 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:03,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:04,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:04,008 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:04,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1195983524, now seen corresponding path program 26 times [2024-09-20 12:17:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:04,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178615202] [2024-09-20 12:17:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:04,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:04,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:04,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:17:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:04,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178615202] [2024-09-20 12:17:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178615202] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:04,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897856238] [2024-09-20 12:17:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:17:04,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:04,659 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-20 12:17:04,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:17:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:04,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:17:04,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:05,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897856238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:06,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-20 12:17:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578105102] [2024-09-20 12:17:06,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:06,553 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 12:17:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 12:17:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-20 12:17:06,555 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:07,525 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-09-20 12:17:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 12:17:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-20 12:17:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:07,526 INFO L225 Difference]: With dead ends: 85 [2024-09-20 12:17:07,526 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 12:17:07,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8930 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 12:17:07,529 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:07,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 12:17:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2024-09-20 12:17:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-09-20 12:17:07,561 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2024-09-20 12:17:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:07,561 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-09-20 12:17:07,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:07,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-09-20 12:17:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 12:17:07,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:07,562 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:07,575 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-09-20 12:17:07,763 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-20 12:17:07,763 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:07,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash -406102117, now seen corresponding path program 26 times [2024-09-20 12:17:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:07,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269548075] [2024-09-20 12:17:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:07,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:07,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:08,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:17:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:08,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269548075] [2024-09-20 12:17:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269548075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265909015] [2024-09-20 12:17:08,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:17:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:08,303 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-20 12:17:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:17:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:08,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:17:08,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:09,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:10,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265909015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:10,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 104 [2024-09-20 12:17:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820544901] [2024-09-20 12:17:10,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:10,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-09-20 12:17:10,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-09-20 12:17:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=8931, Unknown=0, NotChecked=0, Total=10712 [2024-09-20 12:17:10,266 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:11,172 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2024-09-20 12:17:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-20 12:17:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-20 12:17:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:11,173 INFO L225 Difference]: With dead ends: 79 [2024-09-20 12:17:11,173 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 12:17:11,175 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8925 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3075, Invalid=16665, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 12:17:11,175 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:11,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:17:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 12:17:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-20 12:17:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2024-09-20 12:17:11,198 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2024-09-20 12:17:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:11,199 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2024-09-20 12:17:11,199 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:11,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2024-09-20 12:17:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 12:17:11,200 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:11,200 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:11,219 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-20 12:17:11,400 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-20 12:17:11,401 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:11,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 128971489, now seen corresponding path program 27 times [2024-09-20 12:17:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:11,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321971548] [2024-09-20 12:17:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:11,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:11,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:11,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:17:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:12,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:12,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321971548] [2024-09-20 12:17:12,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321971548] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:12,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212555622] [2024-09-20 12:17:12,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:17:12,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:12,024 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:12,025 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-20 12:17:12,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 12:17:12,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:12,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:17:12,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:12,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:14,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212555622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:14,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-20 12:17:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408009260] [2024-09-20 12:17:14,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:14,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 12:17:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:14,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 12:17:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 12:17:14,329 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:15,356 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-09-20 12:17:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:17:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-20 12:17:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:15,357 INFO L225 Difference]: With dead ends: 85 [2024-09-20 12:17:15,357 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 12:17:15,359 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10180 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-20 12:17:15,359 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:15,359 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 37 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:17:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 12:17:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-09-20 12:17:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2024-09-20 12:17:15,375 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2024-09-20 12:17:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:15,375 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2024-09-20 12:17:15,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:15,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2024-09-20 12:17:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 12:17:15,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:15,376 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:15,389 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-20 12:17:15,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-20 12:17:15,576 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:15,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:15,577 INFO L85 PathProgramCache]: Analyzing trace with hash -623473439, now seen corresponding path program 27 times [2024-09-20 12:17:15,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:15,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668633679] [2024-09-20 12:17:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:15,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:15,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:16,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:17:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:16,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668633679] [2024-09-20 12:17:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668633679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:16,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499559044] [2024-09-20 12:17:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:17:16,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:16,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:16,417 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:16,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-20 12:17:16,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 12:17:16,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:16,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:17:16,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:17,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 120 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499559044] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:18,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 111 [2024-09-20 12:17:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798243449] [2024-09-20 12:17:18,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:18,565 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 12:17:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 12:17:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=10243, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 12:17:18,567 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:19,601 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2024-09-20 12:17:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:17:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2024-09-20 12:17:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:19,602 INFO L225 Difference]: With dead ends: 80 [2024-09-20 12:17:19,603 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 12:17:19,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10163 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3393, Invalid=18957, Unknown=0, NotChecked=0, Total=22350 [2024-09-20 12:17:19,604 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:19,604 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 12:17:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-20 12:17:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 61 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2024-09-20 12:17:19,621 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2024-09-20 12:17:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:19,621 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2024-09-20 12:17:19,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:19,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2024-09-20 12:17:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 12:17:19,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:19,622 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:19,636 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-20 12:17:19,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-20 12:17:19,823 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:19,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:19,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1980395099, now seen corresponding path program 28 times [2024-09-20 12:17:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:19,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589669439] [2024-09-20 12:17:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:19,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:19,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:19,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:20,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:17:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589669439] [2024-09-20 12:17:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589669439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439347214] [2024-09-20 12:17:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:17:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:20,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:20,550 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:20,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-20 12:17:20,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:17:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:20,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 12:17:20,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:21,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439347214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:22,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-20 12:17:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054332341] [2024-09-20 12:17:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:22,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-20 12:17:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-20 12:17:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 12:17:22,598 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:23,613 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2024-09-20 12:17:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:17:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-20 12:17:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:23,614 INFO L225 Difference]: With dead ends: 87 [2024-09-20 12:17:23,614 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:17:23,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10092 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-20 12:17:23,617 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:23,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:17:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-09-20 12:17:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-09-20 12:17:23,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 59 [2024-09-20 12:17:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:23,636 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-09-20 12:17:23,636 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:23,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-09-20 12:17:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 12:17:23,637 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:23,637 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:23,654 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-20 12:17:23,838 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:23,838 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:23,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1512704896, now seen corresponding path program 28 times [2024-09-20 12:17:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216509607] [2024-09-20 12:17:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:23,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:23,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:24,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 12:17:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216509607] [2024-09-20 12:17:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216509607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28873477] [2024-09-20 12:17:24,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:17:24,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:24,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:24,453 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:24,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-20 12:17:24,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:17:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:24,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 12:17:24,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:25,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:26,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28873477] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:26,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:26,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 110 [2024-09-20 12:17:26,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411178572] [2024-09-20 12:17:26,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:26,592 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-09-20 12:17:26,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-09-20 12:17:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1993, Invalid=9997, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 12:17:26,594 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:27,554 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2024-09-20 12:17:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:17:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-20 12:17:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:27,556 INFO L225 Difference]: With dead ends: 81 [2024-09-20 12:17:27,556 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 12:17:27,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10053 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3434, Invalid=18618, Unknown=0, NotChecked=0, Total=22052 [2024-09-20 12:17:27,558 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:27,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:17:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 12:17:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 12:17:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 59 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-09-20 12:17:27,593 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2024-09-20 12:17:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:27,593 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-09-20 12:17:27,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:27,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-09-20 12:17:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 12:17:27,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:27,594 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:27,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-20 12:17:27,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:27,795 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:27,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1324073462, now seen corresponding path program 29 times [2024-09-20 12:17:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:27,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249283378] [2024-09-20 12:17:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:27,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:27,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:28,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:17:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249283378] [2024-09-20 12:17:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249283378] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328952238] [2024-09-20 12:17:28,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:17:28,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:28,467 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:28,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-20 12:17:28,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 12:17:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:28,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 12:17:28,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:29,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:30,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328952238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:30,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:30,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-20 12:17:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894455286] [2024-09-20 12:17:30,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:30,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-20 12:17:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-20 12:17:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 12:17:30,903 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:32,072 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-09-20 12:17:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:17:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-20 12:17:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:32,074 INFO L225 Difference]: With dead ends: 87 [2024-09-20 12:17:32,074 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 12:17:32,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-20 12:17:32,077 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:32,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 12:17:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-09-20 12:17:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2024-09-20 12:17:32,112 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 60 [2024-09-20 12:17:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:32,112 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2024-09-20 12:17:32,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:32,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2024-09-20 12:17:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 12:17:32,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:32,113 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:32,131 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:32,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:32,314 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 46852166, now seen corresponding path program 29 times [2024-09-20 12:17:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:32,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566353260] [2024-09-20 12:17:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:32,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:32,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:32,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:32,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:17:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:33,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566353260] [2024-09-20 12:17:33,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566353260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102421252] [2024-09-20 12:17:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:17:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:33,063 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:33,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-20 12:17:33,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 12:17:33,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:33,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 12:17:33,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:34,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 136 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102421252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:35,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:35,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 117 [2024-09-20 12:17:35,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056858211] [2024-09-20 12:17:35,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:35,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-09-20 12:17:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-09-20 12:17:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2189, Invalid=11383, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 12:17:35,383 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:36,473 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2024-09-20 12:17:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:17:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-20 12:17:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:36,474 INFO L225 Difference]: With dead ends: 82 [2024-09-20 12:17:36,474 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 12:17:36,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11330 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3769, Invalid=21037, Unknown=0, NotChecked=0, Total=24806 [2024-09-20 12:17:36,477 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:36,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 49 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 12:17:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 12:17:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.098360655737705) internal successors, (67), 63 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2024-09-20 12:17:36,504 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 60 [2024-09-20 12:17:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:36,504 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2024-09-20 12:17:36,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 116 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:36,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2024-09-20 12:17:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 12:17:36,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:36,505 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:36,524 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:36,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-09-20 12:17:36,706 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:36,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash -222444796, now seen corresponding path program 30 times [2024-09-20 12:17:36,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:36,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285883038] [2024-09-20 12:17:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:36,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:36,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:37,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:17:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:37,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:37,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285883038] [2024-09-20 12:17:37,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285883038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:37,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280472616] [2024-09-20 12:17:37,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:17:37,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:37,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:37,432 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:37,433 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-20 12:17:37,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 12:17:37,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:37,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:17:37,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:38,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280472616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:39,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-20 12:17:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209377182] [2024-09-20 12:17:39,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:39,650 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-20 12:17:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-20 12:17:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 12:17:39,653 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:40,828 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-09-20 12:17:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:17:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-20 12:17:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:40,829 INFO L225 Difference]: With dead ends: 89 [2024-09-20 12:17:40,829 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 12:17:40,831 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-20 12:17:40,831 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:40,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 58 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 12:17:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2024-09-20 12:17:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-09-20 12:17:40,857 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2024-09-20 12:17:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:40,858 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-09-20 12:17:40,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:40,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-09-20 12:17:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 12:17:40,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:40,858 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:40,879 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:41,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:41,059 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:41,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2087519675, now seen corresponding path program 30 times [2024-09-20 12:17:41,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:41,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050191269] [2024-09-20 12:17:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:41,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:41,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:41,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 12:17:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050191269] [2024-09-20 12:17:41,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050191269] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838996471] [2024-09-20 12:17:41,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:17:41,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:41,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:41,733 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:41,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-20 12:17:41,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-20 12:17:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:41,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:17:41,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:42,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:44,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838996471] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:44,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:44,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 116 [2024-09-20 12:17:44,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616841147] [2024-09-20 12:17:44,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:44,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-20 12:17:44,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-20 12:17:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=11123, Unknown=0, NotChecked=0, Total=13340 [2024-09-20 12:17:44,062 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:45,151 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-09-20 12:17:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-20 12:17:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2024-09-20 12:17:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:45,153 INFO L225 Difference]: With dead ends: 83 [2024-09-20 12:17:45,153 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 12:17:45,155 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11248 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3813, Invalid=20679, Unknown=0, NotChecked=0, Total=24492 [2024-09-20 12:17:45,155 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:45,155 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 12:17:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-20 12:17:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 61 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2024-09-20 12:17:45,178 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 61 [2024-09-20 12:17:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:45,178 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2024-09-20 12:17:45,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2024-09-20 12:17:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 12:17:45,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:45,179 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:45,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-09-20 12:17:45,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:45,380 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:45,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -892633471, now seen corresponding path program 31 times [2024-09-20 12:17:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:45,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643479120] [2024-09-20 12:17:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:45,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:45,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:45,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:17:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643479120] [2024-09-20 12:17:46,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643479120] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050670052] [2024-09-20 12:17:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:17:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:46,081 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:46,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-20 12:17:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:46,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 12:17:46,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:47,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050670052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:48,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:48,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-20 12:17:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892032031] [2024-09-20 12:17:48,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:48,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-20 12:17:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-20 12:17:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-20 12:17:48,701 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:49,973 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-09-20 12:17:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:17:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-20 12:17:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:49,975 INFO L225 Difference]: With dead ends: 89 [2024-09-20 12:17:49,975 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 12:17:49,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12561 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-20 12:17:49,977 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:49,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:17:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 12:17:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-09-20 12:17:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2024-09-20 12:17:50,002 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 62 [2024-09-20 12:17:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:50,002 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2024-09-20 12:17:50,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:50,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2024-09-20 12:17:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 12:17:50,003 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:50,003 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:50,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-20 12:17:50,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-20 12:17:50,204 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1878269953, now seen corresponding path program 31 times [2024-09-20 12:17:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96146402] [2024-09-20 12:17:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:50,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:50,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:50,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:17:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:51,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:51,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96146402] [2024-09-20 12:17:51,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96146402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:51,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012060570] [2024-09-20 12:17:51,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:17:51,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:51,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:51,009 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:51,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-20 12:17:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:51,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 12:17:51,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:52,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012060570] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:53,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:53,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 123 [2024-09-20 12:17:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145262116] [2024-09-20 12:17:53,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:53,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-09-20 12:17:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-09-20 12:17:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=12583, Unknown=0, NotChecked=0, Total=15006 [2024-09-20 12:17:53,525 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:54,753 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-09-20 12:17:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:17:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2024-09-20 12:17:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:54,754 INFO L225 Difference]: With dead ends: 84 [2024-09-20 12:17:54,754 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 12:17:54,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12597 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4165, Invalid=23225, Unknown=0, NotChecked=0, Total=27390 [2024-09-20 12:17:54,755 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:54,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 12:17:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 12:17:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:54,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-09-20 12:17:54,781 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 62 [2024-09-20 12:17:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:54,781 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-09-20 12:17:54,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:54,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-09-20 12:17:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:17:54,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:54,783 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:54,796 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-20 12:17:54,983 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:54,983 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:54,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1210559739, now seen corresponding path program 32 times [2024-09-20 12:17:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:54,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669722404] [2024-09-20 12:17:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:54,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:55,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:55,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:55,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:17:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:17:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669722404] [2024-09-20 12:17:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669722404] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:17:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339655694] [2024-09-20 12:17:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:17:55,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:17:55,768 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:17:55,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-20 12:17:55,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:17:55,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:17:55,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 12:17:55,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:17:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:56,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:17:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:17:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339655694] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:17:58,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:17:58,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-20 12:17:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594070661] [2024-09-20 12:17:58,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:17:58,165 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-20 12:17:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:17:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-20 12:17:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-20 12:17:58,167 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:17:59,399 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2024-09-20 12:17:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:17:59,400 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-20 12:17:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:17:59,401 INFO L225 Difference]: With dead ends: 91 [2024-09-20 12:17:59,401 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 12:17:59,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12553 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-20 12:17:59,403 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:17:59,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 55 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:17:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 12:17:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-09-20 12:17:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:17:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-09-20 12:17:59,421 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2024-09-20 12:17:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:17:59,421 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-09-20 12:17:59,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:17:59,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-09-20 12:17:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:17:59,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:17:59,422 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:17:59,435 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-09-20 12:17:59,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:17:59,623 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:17:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:17:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1268071072, now seen corresponding path program 32 times [2024-09-20 12:17:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:17:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942995545] [2024-09-20 12:17:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:17:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:17:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:59,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:17:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:59,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:17:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:17:59,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:17:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:00,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:00,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942995545] [2024-09-20 12:18:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942995545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:00,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971265840] [2024-09-20 12:18:00,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:18:00,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:00,287 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:00,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-20 12:18:00,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:18:00,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:00,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 12:18:00,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 153 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:01,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971265840] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:02,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 122 [2024-09-20 12:18:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607775266] [2024-09-20 12:18:02,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:02,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-20 12:18:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-20 12:18:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=12309, Unknown=0, NotChecked=0, Total=14762 [2024-09-20 12:18:02,798 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:03,924 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2024-09-20 12:18:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:18:03,924 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2024-09-20 12:18:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:03,925 INFO L225 Difference]: With dead ends: 85 [2024-09-20 12:18:03,925 INFO L226 Difference]: Without dead ends: 73 [2024-09-20 12:18:03,927 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12604 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4212, Invalid=22848, Unknown=0, NotChecked=0, Total=27060 [2024-09-20 12:18:03,928 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:03,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 31 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:18:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-20 12:18:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-20 12:18:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-09-20 12:18:03,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2024-09-20 12:18:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:03,949 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-09-20 12:18:03,949 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-09-20 12:18:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 12:18:03,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:03,950 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:03,963 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-20 12:18:04,150 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:04,150 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 580834154, now seen corresponding path program 33 times [2024-09-20 12:18:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295473486] [2024-09-20 12:18:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:04,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:04,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:04,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:18:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:04,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:04,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295473486] [2024-09-20 12:18:04,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295473486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:04,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10774726] [2024-09-20 12:18:04,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:18:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:04,891 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:04,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-20 12:18:05,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 12:18:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:05,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:18:05,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:06,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:07,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10774726] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:07,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:07,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-20 12:18:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938946324] [2024-09-20 12:18:07,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:07,732 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-20 12:18:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-20 12:18:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-20 12:18:07,734 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:08,960 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-09-20 12:18:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:18:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-20 12:18:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:08,961 INFO L225 Difference]: With dead ends: 91 [2024-09-20 12:18:08,961 INFO L226 Difference]: Without dead ends: 80 [2024-09-20 12:18:08,962 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13893 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-20 12:18:08,963 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:08,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:18:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-20 12:18:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-09-20 12:18:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2024-09-20 12:18:08,990 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 64 [2024-09-20 12:18:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:08,990 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2024-09-20 12:18:08,990 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:08,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2024-09-20 12:18:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 12:18:08,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:08,991 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:09,005 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-20 12:18:09,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:09,191 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:09,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash -493591002, now seen corresponding path program 33 times [2024-09-20 12:18:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:09,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958333762] [2024-09-20 12:18:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:09,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:09,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:09,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:18:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958333762] [2024-09-20 12:18:10,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958333762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630396824] [2024-09-20 12:18:10,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:18:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:10,055 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:10,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-20 12:18:10,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 12:18:10,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:10,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:18:10,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:11,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630396824] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:12,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:12,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 129 [2024-09-20 12:18:12,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374705608] [2024-09-20 12:18:12,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:12,764 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-09-20 12:18:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:12,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-09-20 12:18:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2669, Invalid=13843, Unknown=0, NotChecked=0, Total=16512 [2024-09-20 12:18:12,766 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:14,114 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-09-20 12:18:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:18:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2024-09-20 12:18:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:14,115 INFO L225 Difference]: With dead ends: 86 [2024-09-20 12:18:14,115 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:18:14,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13931 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4581, Invalid=25521, Unknown=0, NotChecked=0, Total=30102 [2024-09-20 12:18:14,118 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:14,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:18:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:18:14,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 12:18:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-09-20 12:18:14,138 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 64 [2024-09-20 12:18:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:14,139 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-09-20 12:18:14,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.124031007751938) internal successors, (145), 128 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:14,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-09-20 12:18:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 12:18:14,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:14,140 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:14,154 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-20 12:18:14,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:14,341 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:14,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1180087452, now seen corresponding path program 34 times [2024-09-20 12:18:14,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:14,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429870294] [2024-09-20 12:18:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:14,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:14,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:14,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:18:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:15,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429870294] [2024-09-20 12:18:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429870294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634599240] [2024-09-20 12:18:15,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:18:15,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:15,202 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:15,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-20 12:18:15,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:18:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:15,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 12:18:15,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:16,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634599240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:17,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:17,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-20 12:18:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778852992] [2024-09-20 12:18:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:17,759 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-20 12:18:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-20 12:18:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-20 12:18:17,762 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:19,028 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-09-20 12:18:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:18:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-20 12:18:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:19,030 INFO L225 Difference]: With dead ends: 93 [2024-09-20 12:18:19,030 INFO L226 Difference]: Without dead ends: 83 [2024-09-20 12:18:19,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13844 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-20 12:18:19,033 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:19,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 52 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:18:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-20 12:18:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2024-09-20 12:18:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.078125) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-09-20 12:18:19,064 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 65 [2024-09-20 12:18:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:19,064 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-09-20 12:18:19,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:19,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-09-20 12:18:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 12:18:19,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:19,065 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:19,086 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:19,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:19,266 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:19,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1781316645, now seen corresponding path program 34 times [2024-09-20 12:18:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32982839] [2024-09-20 12:18:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:19,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:19,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:19,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 12:18:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:20,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32982839] [2024-09-20 12:18:20,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32982839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:20,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687124696] [2024-09-20 12:18:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:18:20,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:20,006 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:20,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-20 12:18:20,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:18:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:20,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 12:18:20,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 171 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:21,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687124696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:22,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:22,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 128 [2024-09-20 12:18:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336769862] [2024-09-20 12:18:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:22,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-09-20 12:18:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-09-20 12:18:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=13555, Unknown=0, NotChecked=0, Total=16256 [2024-09-20 12:18:22,755 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:24,069 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2024-09-20 12:18:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:18:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2024-09-20 12:18:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:24,071 INFO L225 Difference]: With dead ends: 87 [2024-09-20 12:18:24,071 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 12:18:24,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13839 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4631, Invalid=25125, Unknown=0, NotChecked=0, Total=29756 [2024-09-20 12:18:24,073 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:24,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 49 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:18:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 12:18:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 12:18:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2024-09-20 12:18:24,094 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2024-09-20 12:18:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:24,094 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2024-09-20 12:18:24,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:24,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2024-09-20 12:18:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 12:18:24,094 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:24,095 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:24,108 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-09-20 12:18:24,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:24,295 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:24,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -514784735, now seen corresponding path program 35 times [2024-09-20 12:18:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69479236] [2024-09-20 12:18:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:24,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:24,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:24,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:18:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:25,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69479236] [2024-09-20 12:18:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69479236] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297771539] [2024-09-20 12:18:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:18:25,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:25,149 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:25,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-20 12:18:25,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-20 12:18:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:25,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:18:25,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:26,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297771539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:28,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:28,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-20 12:18:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859228946] [2024-09-20 12:18:28,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:28,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-20 12:18:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-20 12:18:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-20 12:18:28,221 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:29,742 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-09-20 12:18:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 12:18:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-20 12:18:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:29,743 INFO L225 Difference]: With dead ends: 93 [2024-09-20 12:18:29,744 INFO L226 Difference]: Without dead ends: 82 [2024-09-20 12:18:29,745 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15394 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-20 12:18:29,746 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:29,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:18:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-20 12:18:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2024-09-20 12:18:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-09-20 12:18:29,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2024-09-20 12:18:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:29,767 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-09-20 12:18:29,767 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:29,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-09-20 12:18:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 12:18:29,767 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:29,768 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:29,781 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-09-20 12:18:29,968 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:29,968 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:29,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash -535311583, now seen corresponding path program 35 times [2024-09-20 12:18:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:29,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346649994] [2024-09-20 12:18:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:30,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:30,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:30,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:18:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346649994] [2024-09-20 12:18:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346649994] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477265] [2024-09-20 12:18:30,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:18:30,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:30,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:30,891 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:30,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-20 12:18:31,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-20 12:18:31,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:31,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:18:31,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:32,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:33,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 135 [2024-09-20 12:18:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964884121] [2024-09-20 12:18:33,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:33,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-09-20 12:18:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-09-20 12:18:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=15163, Unknown=0, NotChecked=0, Total=18090 [2024-09-20 12:18:33,820 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:35,275 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-09-20 12:18:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 12:18:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2024-09-20 12:18:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:35,277 INFO L225 Difference]: With dead ends: 88 [2024-09-20 12:18:35,277 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 12:18:35,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15373 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5017, Invalid=27925, Unknown=0, NotChecked=0, Total=32942 [2024-09-20 12:18:35,279 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:35,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 82 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:18:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 12:18:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-20 12:18:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 69 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-09-20 12:18:35,301 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 66 [2024-09-20 12:18:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:35,302 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-09-20 12:18:35,302 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 134 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:35,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-09-20 12:18:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 12:18:35,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:35,302 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:35,316 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-20 12:18:35,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:35,503 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:35,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash -543333477, now seen corresponding path program 36 times [2024-09-20 12:18:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676082809] [2024-09-20 12:18:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:35,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:35,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:35,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:18:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676082809] [2024-09-20 12:18:36,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676082809] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601638602] [2024-09-20 12:18:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:18:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:36,425 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:36,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-20 12:18:36,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 12:18:36,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:36,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 12:18:36,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:37,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:39,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601638602] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:39,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-20 12:18:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360891132] [2024-09-20 12:18:39,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:39,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-20 12:18:39,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-20 12:18:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 12:18:39,213 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:40,553 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2024-09-20 12:18:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 12:18:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-20 12:18:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:40,555 INFO L225 Difference]: With dead ends: 95 [2024-09-20 12:18:40,555 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 12:18:40,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15240 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-20 12:18:40,558 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:40,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:18:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 12:18:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2024-09-20 12:18:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 68 states have internal predecessors, (71), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-09-20 12:18:40,590 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2024-09-20 12:18:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:40,590 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-09-20 12:18:40,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:40,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-09-20 12:18:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 12:18:40,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:40,591 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:40,610 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-20 12:18:40,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-20 12:18:40,792 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:40,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1220312640, now seen corresponding path program 36 times [2024-09-20 12:18:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:40,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838433825] [2024-09-20 12:18:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:40,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:40,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:41,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:18:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:41,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838433825] [2024-09-20 12:18:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838433825] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:41,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496462845] [2024-09-20 12:18:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:18:41,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:41,588 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:41,589 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-20 12:18:41,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 12:18:41,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:18:41,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 12:18:41,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:42,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496462845] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:44,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 134 [2024-09-20 12:18:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385636827] [2024-09-20 12:18:44,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:44,602 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-09-20 12:18:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-09-20 12:18:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=14861, Unknown=0, NotChecked=0, Total=17822 [2024-09-20 12:18:44,604 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:45,838 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2024-09-20 12:18:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 12:18:45,839 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2024-09-20 12:18:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:45,840 INFO L225 Difference]: With dead ends: 89 [2024-09-20 12:18:45,840 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 12:18:45,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15339 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5070, Invalid=27510, Unknown=0, NotChecked=0, Total=32580 [2024-09-20 12:18:45,842 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:45,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 34 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:18:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 12:18:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-20 12:18:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-09-20 12:18:45,864 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2024-09-20 12:18:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:45,864 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-09-20 12:18:45,864 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:45,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-09-20 12:18:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 12:18:45,865 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:45,865 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:45,883 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-09-20 12:18:46,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:46,066 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:46,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2044719306, now seen corresponding path program 37 times [2024-09-20 12:18:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090028533] [2024-09-20 12:18:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:46,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:46,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:46,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:18:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:46,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090028533] [2024-09-20 12:18:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090028533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:46,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786999909] [2024-09-20 12:18:46,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:18:46,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:46,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:46,899 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-20 12:18:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:47,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 12:18:47,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:48,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:18:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786999909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:18:50,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:18:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 141 [2024-09-20 12:18:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895949067] [2024-09-20 12:18:50,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:18:50,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-09-20 12:18:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:18:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-09-20 12:18:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3197, Invalid=16543, Unknown=0, NotChecked=0, Total=19740 [2024-09-20 12:18:50,487 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:18:52,033 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-09-20 12:18:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 12:18:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2024-09-20 12:18:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:18:52,034 INFO L225 Difference]: With dead ends: 95 [2024-09-20 12:18:52,034 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 12:18:52,037 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16758 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5473, Invalid=30437, Unknown=0, NotChecked=0, Total=35910 [2024-09-20 12:18:52,037 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:18:52,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 73 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:18:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 12:18:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2024-09-20 12:18:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-20 12:18:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2024-09-20 12:18:52,062 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 68 [2024-09-20 12:18:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:18:52,062 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2024-09-20 12:18:52,062 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 140 states have internal predecessors, (157), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:18:52,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2024-09-20 12:18:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 12:18:52,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:18:52,063 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:18:52,083 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-20 12:18:52,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:52,265 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:18:52,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:18:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 335301638, now seen corresponding path program 37 times [2024-09-20 12:18:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:18:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604271405] [2024-09-20 12:18:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:18:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:18:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:52,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:18:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:52,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 12:18:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:52,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-20 12:18:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:53,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:18:53,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604271405] [2024-09-20 12:18:53,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604271405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:18:53,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313677956] [2024-09-20 12:18:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:18:53,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:18:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:18:53,442 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:18:53,443 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-20 12:18:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:18:53,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 12:18:53,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:18:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:18:54,730 INFO L327 TraceCheckSpWp]: Computing backward predicates...