./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:54:31,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:54:31,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:54:31,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:54:31,130 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:54:31,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:54:31,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:54:31,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:54:31,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:54:31,159 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:54:31,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:54:31,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:54:31,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:54:31,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:54:31,161 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:54:31,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:54:31,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:54:31,165 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:54:31,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:54:31,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:54:31,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:54:31,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:54:31,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:54:31,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:54:31,170 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:54:31,170 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:54:31,170 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:54:31,171 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:54:31,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:54:31,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:54:31,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:54:31,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:54:31,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:54:31,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:54:31,172 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:54:31,172 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:54:31,172 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:54:31,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:54:31,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:54:31,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:54:31,175 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:54:31,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:54:31,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:54:31,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:54:31,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:54:31,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:54:31,519 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:54:31,519 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:54:31,521 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-15 18:54:33,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:54:33,273 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:54:33,274 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-15 18:54:33,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b6bb73fc3/16f95cd0f40c43e09f3aa2f37f0b4523/FLAGeb784b410 [2024-09-15 18:54:33,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b6bb73fc3/16f95cd0f40c43e09f3aa2f37f0b4523 [2024-09-15 18:54:33,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:54:33,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:54:33,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:54:33,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:54:33,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:54:33,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44018559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33, skipping insertion in model container [2024-09-15 18:54:33,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,697 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:54:33,845 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2024-09-15 18:54:33,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:54:33,879 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:54:33,903 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/theatreSquare.c[370,383] [2024-09-15 18:54:33,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:54:33,937 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:54:33,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33 WrapperNode [2024-09-15 18:54:33,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:54:33,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:54:33,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:54:33,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:54:33,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,961 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:54:33,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:54:33,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:54:33,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:54:33,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:54:33,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,989 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]. [2024-09-15 18:54:33,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:33,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:34,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:34,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:54:34,004 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:54:34,004 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:54:34,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:54:34,005 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (1/1) ... [2024-09-15 18:54:34,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:54:34,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:34,036 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) [2024-09-15 18:54:34,040 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 [2024-09-15 18:54:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:54:34,087 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-15 18:54:34,087 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-15 18:54:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:54:34,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:54:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:54:34,088 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-15 18:54:34,089 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-15 18:54:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:54:34,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:54:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:54:34,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:54:34,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:54:34,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:54:34,165 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:54:34,167 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:54:34,389 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-09-15 18:54:34,389 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:54:34,417 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:54:34,417 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-15 18:54:34,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:54:34 BoogieIcfgContainer [2024-09-15 18:54:34,418 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:54:34,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:54:34,421 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:54:34,424 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:54:34,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:54:33" (1/3) ... [2024-09-15 18:54:34,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31557d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:54:34, skipping insertion in model container [2024-09-15 18:54:34,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:54:33" (2/3) ... [2024-09-15 18:54:34,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31557d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:54:34, skipping insertion in model container [2024-09-15 18:54:34,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:54:34" (3/3) ... [2024-09-15 18:54:34,428 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2024-09-15 18:54:34,457 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:54:34,457 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:54:34,518 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:54:34,525 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;@32998fd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:54:34,525 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:54:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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) [2024-09-15 18:54:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-15 18:54:34,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:34,536 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:34,537 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:34,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:34,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1398085946, now seen corresponding path program 1 times [2024-09-15 18:54:34,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:34,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829587120] [2024-09-15 18:54:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:34,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:54:34,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:34,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829587120] [2024-09-15 18:54:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829587120] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:34,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:34,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183895354] [2024-09-15 18:54:34,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:34,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:34,852 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 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 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:54:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:34,952 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2024-09-15 18:54:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-15 18:54:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:34,961 INFO L225 Difference]: With dead ends: 68 [2024-09-15 18:54:34,961 INFO L226 Difference]: Without dead ends: 29 [2024-09-15 18:54:34,964 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:54:34,967 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:34,968 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-15 18:54:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-15 18:54:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-09-15 18:54:35,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2024-09-15 18:54:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:35,000 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-09-15 18:54:35,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:54:35,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,002 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-09-15 18:54:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:54:35,003 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:35,003 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, 1, 1] [2024-09-15 18:54:35,003 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:54:35,004 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:35,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1021222372, now seen corresponding path program 1 times [2024-09-15 18:54:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324218640] [2024-09-15 18:54:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:35,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:54:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:54:35,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324218640] [2024-09-15 18:54:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324218640] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:35,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:35,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-15 18:54:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776090903] [2024-09-15 18:54:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:35,459 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:54:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:54:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:54:35,463 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-09-15 18:54:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:35,624 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-09-15 18:54:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 18:54:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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 28 [2024-09-15 18:54:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:35,627 INFO L225 Difference]: With dead ends: 45 [2024-09-15 18:54:35,628 INFO L226 Difference]: Without dead ends: 39 [2024-09-15 18:54:35,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-09-15 18:54:35,629 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:35,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-15 18:54:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-15 18:54:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.32) internal successors, (33), 27 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) [2024-09-15 18:54:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-09-15 18:54:35,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 28 [2024-09-15 18:54:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:35,646 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-09-15 18:54:35,646 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-09-15 18:54:35,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-09-15 18:54:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:54:35,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:35,650 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, 1, 1, 1] [2024-09-15 18:54:35,650 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:54:35,651 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:35,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1777130061, now seen corresponding path program 1 times [2024-09-15 18:54:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435846633] [2024-09-15 18:54:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:54:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:54:35,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435846633] [2024-09-15 18:54:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435846633] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:35,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:35,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 18:54:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175172963] [2024-09-15 18:54:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:35,723 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:54:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:54:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 18:54:35,725 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:35,760 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-09-15 18:54:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:54:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 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 29 [2024-09-15 18:54:35,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:35,762 INFO L225 Difference]: With dead ends: 62 [2024-09-15 18:54:35,762 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 18:54:35,763 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 [2024-09-15 18:54:35,764 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:35,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 18:54:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-15 18:54:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 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) [2024-09-15 18:54:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-15 18:54:35,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 29 [2024-09-15 18:54:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:35,776 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-15 18:54:35,776 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:35,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-15 18:54:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:54:35,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:35,779 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, 1, 1, 1] [2024-09-15 18:54:35,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:54:35,780 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:35,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -464096742, now seen corresponding path program 1 times [2024-09-15 18:54:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:35,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627539328] [2024-09-15 18:54:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:54:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:54:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627539328] [2024-09-15 18:54:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627539328] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:35,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:35,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 18:54:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604641769] [2024-09-15 18:54:35,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:35,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:54:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:54:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 18:54:35,876 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:35,909 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-09-15 18:54:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:54:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 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 29 [2024-09-15 18:54:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:35,911 INFO L225 Difference]: With dead ends: 54 [2024-09-15 18:54:35,912 INFO L226 Difference]: Without dead ends: 45 [2024-09-15 18:54:35,913 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 [2024-09-15 18:54:35,914 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:35,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-15 18:54:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-15 18:54:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 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) [2024-09-15 18:54:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2024-09-15 18:54:35,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2024-09-15 18:54:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:35,932 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2024-09-15 18:54:35,933 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:35,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2024-09-15 18:54:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:54:35,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:35,935 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, 1, 1, 1, 1] [2024-09-15 18:54:35,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 18:54:35,937 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:35,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1580607788, now seen corresponding path program 1 times [2024-09-15 18:54:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565982156] [2024-09-15 18:54:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:35,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:54:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565982156] [2024-09-15 18:54:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565982156] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373201208] [2024-09-15 18:54:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,050 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,084 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-15 18:54:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-15 18:54:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,086 INFO L225 Difference]: With dead ends: 69 [2024-09-15 18:54:36,086 INFO L226 Difference]: Without dead ends: 42 [2024-09-15 18:54:36,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,087 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-15 18:54:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-15 18:54:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 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) [2024-09-15 18:54:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-09-15 18:54:36,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2024-09-15 18:54:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,098 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-09-15 18:54:36,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-09-15 18:54:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:54:36,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,101 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, 1, 1, 1, 1] [2024-09-15 18:54:36,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 18:54:36,102 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -83212372, now seen corresponding path program 1 times [2024-09-15 18:54:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047292332] [2024-09-15 18:54:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 18:54:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047292332] [2024-09-15 18:54:36,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047292332] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816897296] [2024-09-15 18:54:36,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,250 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,282 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-09-15 18:54:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-15 18:54:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,284 INFO L225 Difference]: With dead ends: 74 [2024-09-15 18:54:36,284 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 18:54:36,285 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,286 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 18:54:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-15 18:54:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 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) [2024-09-15 18:54:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-09-15 18:54:36,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2024-09-15 18:54:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,295 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-09-15 18:54:36,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-09-15 18:54:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:54:36,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,297 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, 1, 1, 1, 1, 1] [2024-09-15 18:54:36,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 18:54:36,297 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -877631710, now seen corresponding path program 1 times [2024-09-15 18:54:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402768304] [2024-09-15 18:54:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:54:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402768304] [2024-09-15 18:54:36,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402768304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417649391] [2024-09-15 18:54:36,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,412 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,437 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-09-15 18:54:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-09-15 18:54:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,439 INFO L225 Difference]: With dead ends: 60 [2024-09-15 18:54:36,439 INFO L226 Difference]: Without dead ends: 45 [2024-09-15 18:54:36,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,440 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-15 18:54:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-15 18:54:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 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) [2024-09-15 18:54:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-09-15 18:54:36,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 31 [2024-09-15 18:54:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,448 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-09-15 18:54:36,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-09-15 18:54:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 18:54:36,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,450 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, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:36,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 18:54:36,450 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 659613075, now seen corresponding path program 1 times [2024-09-15 18:54:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630552026] [2024-09-15 18:54:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:36,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630552026] [2024-09-15 18:54:36,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630552026] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553969977] [2024-09-15 18:54:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,557 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,578 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-15 18:54:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-15 18:54:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,579 INFO L225 Difference]: With dead ends: 53 [2024-09-15 18:54:36,580 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 18:54:36,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,581 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 18:54:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-15 18:54:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 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) [2024-09-15 18:54:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-09-15 18:54:36,589 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2024-09-15 18:54:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,590 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-09-15 18:54:36,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-09-15 18:54:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 18:54:36,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,594 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:36,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-15 18:54:36,596 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1195320207, now seen corresponding path program 1 times [2024-09-15 18:54:36,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619477469] [2024-09-15 18:54:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619477469] [2024-09-15 18:54:36,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619477469] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805166479] [2024-09-15 18:54:36,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,671 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,701 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-09-15 18:54:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 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 33 [2024-09-15 18:54:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,702 INFO L225 Difference]: With dead ends: 47 [2024-09-15 18:54:36,702 INFO L226 Difference]: Without dead ends: 39 [2024-09-15 18:54:36,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:54:36,703 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-15 18:54:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-09-15 18:54:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-09-15 18:54:36,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2024-09-15 18:54:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,709 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-09-15 18:54:36,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:36,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-09-15 18:54:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 18:54:36,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,710 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:36,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-15 18:54:36,711 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash -358658342, now seen corresponding path program 1 times [2024-09-15 18:54:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921040343] [2024-09-15 18:54:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 18:54:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921040343] [2024-09-15 18:54:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921040343] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:54:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:54:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 18:54:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721452216] [2024-09-15 18:54:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:54:36,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:54:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:54:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:54:36,812 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:36,839 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-09-15 18:54:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:54:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 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 33 [2024-09-15 18:54:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:36,841 INFO L225 Difference]: With dead ends: 55 [2024-09-15 18:54:36,841 INFO L226 Difference]: Without dead ends: 35 [2024-09-15 18:54:36,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:54:36,842 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:36,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-15 18:54:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-15 18:54:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:54:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-09-15 18:54:36,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2024-09-15 18:54:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:36,847 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-09-15 18:54:36,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 18:54:36,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-09-15 18:54:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 18:54:36,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:36,848 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:36,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-15 18:54:36,848 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:36,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1566162331, now seen corresponding path program 1 times [2024-09-15 18:54:36,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:36,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548898231] [2024-09-15 18:54:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:36,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:37,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:37,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:37,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:37,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548898231] [2024-09-15 18:54:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548898231] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:37,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041494787] [2024-09-15 18:54:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:37,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:37,244 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) [2024-09-15 18:54:37,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:54:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:37,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 18:54:37,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:37,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041494787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:37,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:37,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 24 [2024-09-15 18:54:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862809931] [2024-09-15 18:54:37,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:37,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:54:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:54:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:54:37,735 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:37,962 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-15 18:54:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 18:54:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-15 18:54:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:37,964 INFO L225 Difference]: With dead ends: 63 [2024-09-15 18:54:37,964 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 18:54:37,964 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:54:37,965 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:37,965 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 496 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 18:54:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-09-15 18:54:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 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) [2024-09-15 18:54:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-09-15 18:54:37,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2024-09-15 18:54:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:37,973 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-09-15 18:54:37,973 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:37,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-09-15 18:54:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:54:37,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:37,974 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, 1, 1, 1, 1] [2024-09-15 18:54:37,991 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:54:38,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 18:54:38,175 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:38,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -344080326, now seen corresponding path program 2 times [2024-09-15 18:54:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:38,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223379478] [2024-09-15 18:54:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:54:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:38,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223379478] [2024-09-15 18:54:38,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223379478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:38,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124101750] [2024-09-15 18:54:38,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:54:38,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:38,269 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) [2024-09-15 18:54:38,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:54:38,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:38,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:38,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 18:54:38,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124101750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:38,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-15 18:54:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646678459] [2024-09-15 18:54:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:38,401 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 18:54:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 18:54:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:54:38,402 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:38,430 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-09-15 18:54:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:54:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-15 18:54:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:38,432 INFO L225 Difference]: With dead ends: 86 [2024-09-15 18:54:38,432 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 18:54:38,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:54:38,434 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:38,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 18:54:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-15 18:54:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 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) [2024-09-15 18:54:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-09-15 18:54:38,446 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 35 [2024-09-15 18:54:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:38,446 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-09-15 18:54:38,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:38,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-09-15 18:54:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:54:38,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:38,451 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, 1, 1, 1, 1] [2024-09-15 18:54:38,468 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:38,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-15 18:54:38,651 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:38,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -177366287, now seen corresponding path program 3 times [2024-09-15 18:54:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:38,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170244725] [2024-09-15 18:54:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:38,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170244725] [2024-09-15 18:54:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170244725] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714152377] [2024-09-15 18:54:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:54:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:38,720 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) [2024-09-15 18:54:38,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:54:38,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-15 18:54:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:38,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 18:54:38,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:38,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714152377] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:38,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:38,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-15 18:54:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417039833] [2024-09-15 18:54:38,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:38,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 18:54:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 18:54:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:54:38,867 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:38,915 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-09-15 18:54:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:54:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 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 35 [2024-09-15 18:54:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:38,917 INFO L225 Difference]: With dead ends: 78 [2024-09-15 18:54:38,917 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 18:54:38,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:54:38,918 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:38,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 18:54:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-15 18:54:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.280701754385965) internal successors, (73), 59 states have internal predecessors, (73), 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) [2024-09-15 18:54:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-09-15 18:54:38,928 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 35 [2024-09-15 18:54:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:38,928 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-09-15 18:54:38,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:38,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-09-15 18:54:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:54:38,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:38,929 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, 1, 1, 1, 1] [2024-09-15 18:54:38,946 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:39,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 18:54:39,130 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:39,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:39,131 INFO L85 PathProgramCache]: Analyzing trace with hash -253773038, now seen corresponding path program 4 times [2024-09-15 18:54:39,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:39,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046594538] [2024-09-15 18:54:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:39,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:39,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:39,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:39,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046594538] [2024-09-15 18:54:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046594538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101690169] [2024-09-15 18:54:39,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:54:39,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:39,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:39,353 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) [2024-09-15 18:54:39,355 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:54:39,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:54:39,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:39,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:54:39,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:39,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101690169] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:39,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:39,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-15 18:54:39,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244949992] [2024-09-15 18:54:39,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:39,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:54:39,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:39,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:54:39,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:54:39,867 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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) [2024-09-15 18:54:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:40,013 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-09-15 18:54:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 35 [2024-09-15 18:54:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:40,015 INFO L225 Difference]: With dead ends: 85 [2024-09-15 18:54:40,015 INFO L226 Difference]: Without dead ends: 79 [2024-09-15 18:54:40,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:54:40,016 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:40,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-15 18:54:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-15 18:54:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-15 18:54:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-09-15 18:54:40,037 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 35 [2024-09-15 18:54:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:40,037 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-09-15 18:54:40,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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) [2024-09-15 18:54:40,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-09-15 18:54:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:54:40,038 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:40,038 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, 1, 1, 1, 1] [2024-09-15 18:54:40,055 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:54:40,239 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:40,239 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:40,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891291, now seen corresponding path program 5 times [2024-09-15 18:54:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372117035] [2024-09-15 18:54:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:40,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:40,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:40,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:54:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:40,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372117035] [2024-09-15 18:54:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372117035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760933609] [2024-09-15 18:54:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:54:40,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:40,442 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) [2024-09-15 18:54:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:54:40,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:40,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:40,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:54:40,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:40,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760933609] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:40,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-15 18:54:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161452956] [2024-09-15 18:54:40,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:40,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:54:40,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:54:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:54:40,867 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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) [2024-09-15 18:54:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:40,998 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-09-15 18:54:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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 35 [2024-09-15 18:54:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:41,000 INFO L225 Difference]: With dead ends: 85 [2024-09-15 18:54:41,000 INFO L226 Difference]: Without dead ends: 79 [2024-09-15 18:54:41,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:54:41,001 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:41,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 273 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-15 18:54:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-15 18:54:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 18:54:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-09-15 18:54:41,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 35 [2024-09-15 18:54:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:41,011 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-09-15 18:54:41,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 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) [2024-09-15 18:54:41,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-09-15 18:54:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:54:41,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:41,012 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, 1, 1, 1, 1] [2024-09-15 18:54:41,028 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:54:41,216 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 18:54:41,217 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:41,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1445540013, now seen corresponding path program 6 times [2024-09-15 18:54:41,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:41,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576750695] [2024-09-15 18:54:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:41,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:41,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:41,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:41,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:54:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:41,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576750695] [2024-09-15 18:54:41,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576750695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:41,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099841043] [2024-09-15 18:54:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:54:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:41,464 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) [2024-09-15 18:54:41,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:54:41,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-15 18:54:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:41,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:54:41,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:41,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:41,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099841043] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:41,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-15 18:54:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572912996] [2024-09-15 18:54:41,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:41,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:54:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:54:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:54:41,886 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-15 18:54:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:42,043 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-09-15 18:54:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 36 [2024-09-15 18:54:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:42,044 INFO L225 Difference]: With dead ends: 97 [2024-09-15 18:54:42,044 INFO L226 Difference]: Without dead ends: 84 [2024-09-15 18:54:42,045 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:54:42,046 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:42,046 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 413 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-15 18:54:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-09-15 18:54:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 68 states have internal predecessors, (79), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-15 18:54:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-09-15 18:54:42,056 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 36 [2024-09-15 18:54:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:42,056 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-09-15 18:54:42,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-15 18:54:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-09-15 18:54:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:54:42,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:42,058 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, 1, 1, 1, 1] [2024-09-15 18:54:42,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:54:42,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 18:54:42,259 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:42,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1200674140, now seen corresponding path program 7 times [2024-09-15 18:54:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295105637] [2024-09-15 18:54:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:42,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:42,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:42,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:42,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:54:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295105637] [2024-09-15 18:54:42,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295105637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048424663] [2024-09-15 18:54:42,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:54:42,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:42,590 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) [2024-09-15 18:54:42,592 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:54:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:42,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:54:42,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:42,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:42,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048424663] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:42,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2024-09-15 18:54:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144924829] [2024-09-15 18:54:42,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:42,931 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 18:54:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 18:54:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:54:42,932 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:43,225 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2024-09-15 18:54:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 18:54:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-09-15 18:54:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:43,227 INFO L225 Difference]: With dead ends: 122 [2024-09-15 18:54:43,228 INFO L226 Difference]: Without dead ends: 116 [2024-09-15 18:54:43,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:54:43,229 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:43,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 623 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-15 18:54:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2024-09-15 18:54:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 94 states have internal predecessors, (107), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-15 18:54:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2024-09-15 18:54:43,251 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 36 [2024-09-15 18:54:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:43,251 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2024-09-15 18:54:43,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:43,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2024-09-15 18:54:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:54:43,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:43,253 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, 1, 1, 1, 1] [2024-09-15 18:54:43,271 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 18:54:43,454 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 18:54:43,454 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:43,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1664629901, now seen corresponding path program 8 times [2024-09-15 18:54:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141607974] [2024-09-15 18:54:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:43,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:43,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:43,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:43,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:43,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141607974] [2024-09-15 18:54:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141607974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474697116] [2024-09-15 18:54:43,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:54:43,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:43,685 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) [2024-09-15 18:54:43,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:54:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:43,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:54:43,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:43,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:44,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474697116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:44,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:44,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-15 18:54:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426267148] [2024-09-15 18:54:44,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:44,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:54:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:54:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:54:44,101 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-15 18:54:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:44,272 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2024-09-15 18:54:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 36 [2024-09-15 18:54:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:44,275 INFO L225 Difference]: With dead ends: 118 [2024-09-15 18:54:44,275 INFO L226 Difference]: Without dead ends: 107 [2024-09-15 18:54:44,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:54:44,276 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:44,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 371 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-15 18:54:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-15 18:54:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.271604938271605) internal successors, (103), 91 states have internal predecessors, (103), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-15 18:54:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2024-09-15 18:54:44,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 36 [2024-09-15 18:54:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:44,298 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2024-09-15 18:54:44,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-15 18:54:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2024-09-15 18:54:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 18:54:44,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:44,300 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, 1, 1, 1, 1] [2024-09-15 18:54:44,319 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:44,504 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:44,505 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:44,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:44,505 INFO L85 PathProgramCache]: Analyzing trace with hash -381188357, now seen corresponding path program 9 times [2024-09-15 18:54:44,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451007522] [2024-09-15 18:54:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:44,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:44,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:44,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:54:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451007522] [2024-09-15 18:54:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451007522] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35491186] [2024-09-15 18:54:44,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:54:44,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:44,753 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) [2024-09-15 18:54:44,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:54:44,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:54:44,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:44,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:54:44,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:44,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35491186] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:45,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-15 18:54:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612522300] [2024-09-15 18:54:45,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:45,329 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:54:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:54:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:54:45,330 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2024-09-15 18:54:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:45,605 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-15 18:54:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:54:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 37 [2024-09-15 18:54:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:45,608 INFO L225 Difference]: With dead ends: 121 [2024-09-15 18:54:45,608 INFO L226 Difference]: Without dead ends: 108 [2024-09-15 18:54:45,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:54:45,609 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:45,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 376 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-15 18:54:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-09-15 18:54:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-15 18:54:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2024-09-15 18:54:45,631 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 37 [2024-09-15 18:54:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:45,632 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2024-09-15 18:54:45,632 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2024-09-15 18:54:45,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2024-09-15 18:54:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 18:54:45,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:45,634 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, 1, 1, 1, 1] [2024-09-15 18:54:45,647 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:45,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:45,838 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:45,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash -956103598, now seen corresponding path program 10 times [2024-09-15 18:54:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799469388] [2024-09-15 18:54:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:45,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:45,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:45,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:46,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:46,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799469388] [2024-09-15 18:54:46,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799469388] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:46,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212724066] [2024-09-15 18:54:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:54:46,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:46,068 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) [2024-09-15 18:54:46,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:54:46,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:54:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:46,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:54:46,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:46,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:46,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212724066] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:46,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:46,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-15 18:54:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115643018] [2024-09-15 18:54:46,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:46,601 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:54:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:54:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:54:46,602 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2024-09-15 18:54:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:46,824 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-15 18:54:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:54:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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 37 [2024-09-15 18:54:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:46,826 INFO L225 Difference]: With dead ends: 114 [2024-09-15 18:54:46,826 INFO L226 Difference]: Without dead ends: 103 [2024-09-15 18:54:46,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:54:46,828 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:46,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 412 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-15 18:54:46,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-09-15 18:54:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 87 states have internal predecessors, (99), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 18:54:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2024-09-15 18:54:46,845 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 37 [2024-09-15 18:54:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:46,845 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2024-09-15 18:54:46,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2024-09-15 18:54:46,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2024-09-15 18:54:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 18:54:46,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:46,852 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:46,869 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 18:54:47,053 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:47,053 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:47,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash -503145867, now seen corresponding path program 11 times [2024-09-15 18:54:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:47,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317001120] [2024-09-15 18:54:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317001120] [2024-09-15 18:54:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317001120] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621393864] [2024-09-15 18:54:47,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:54:47,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:47,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:47,151 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) [2024-09-15 18:54:47,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:54:47,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:47,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:54:47,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621393864] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:47,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-15 18:54:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500740966] [2024-09-15 18:54:47,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:47,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:54:47,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:54:47,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:54:47,279 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:47,329 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-09-15 18:54:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:54:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 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 37 [2024-09-15 18:54:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:47,331 INFO L225 Difference]: With dead ends: 110 [2024-09-15 18:54:47,331 INFO L226 Difference]: Without dead ends: 98 [2024-09-15 18:54:47,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:54:47,332 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:47,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-15 18:54:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-09-15 18:54:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 18:54:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-09-15 18:54:47,349 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 37 [2024-09-15 18:54:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:47,349 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-09-15 18:54:47,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:47,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-09-15 18:54:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 18:54:47,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:47,350 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:47,367 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 18:54:47,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:47,555 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash 567096122, now seen corresponding path program 12 times [2024-09-15 18:54:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948229919] [2024-09-15 18:54:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:47,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:54:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:47,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948229919] [2024-09-15 18:54:47,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948229919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:47,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752930999] [2024-09-15 18:54:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:54:47,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:47,648 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) [2024-09-15 18:54:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 18:54:47,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-15 18:54:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:47,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 18:54:47,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:47,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752930999] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:47,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:47,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-15 18:54:47,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589211648] [2024-09-15 18:54:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:47,791 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:54:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:54:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:54:47,791 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:47,840 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2024-09-15 18:54:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:54:47,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-15 18:54:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:47,843 INFO L225 Difference]: With dead ends: 144 [2024-09-15 18:54:47,843 INFO L226 Difference]: Without dead ends: 91 [2024-09-15 18:54:47,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-15 18:54:47,844 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:47,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-15 18:54:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-09-15 18:54:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 79 states have internal predecessors, (91), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 18:54:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-09-15 18:54:47,862 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 37 [2024-09-15 18:54:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:47,862 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-09-15 18:54:47,862 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:47,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-09-15 18:54:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:54:47,863 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:47,863 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, 1, 1, 1, 1] [2024-09-15 18:54:47,879 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 18:54:48,064 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-15 18:54:48,065 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:48,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1478178501, now seen corresponding path program 13 times [2024-09-15 18:54:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734322930] [2024-09-15 18:54:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:48,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:48,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:48,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:48,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734322930] [2024-09-15 18:54:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734322930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382151246] [2024-09-15 18:54:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:54:48,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:48,439 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) [2024-09-15 18:54:48,440 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 18:54:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:48,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:54:48,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:48,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382151246] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:48,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:48,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-09-15 18:54:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890206253] [2024-09-15 18:54:48,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:48,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 18:54:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 18:54:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:54:48,788 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:49,154 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2024-09-15 18:54:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:54:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-15 18:54:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:49,156 INFO L225 Difference]: With dead ends: 127 [2024-09-15 18:54:49,156 INFO L226 Difference]: Without dead ends: 121 [2024-09-15 18:54:49,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:54:49,157 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:49,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 960 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:54:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-15 18:54:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-09-15 18:54:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 92 states have internal predecessors, (104), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 18:54:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-15 18:54:49,177 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 38 [2024-09-15 18:54:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:49,177 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-15 18:54:49,177 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:49,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-15 18:54:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:54:49,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:49,178 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:49,195 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 18:54:49,382 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:49,382 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1583594271, now seen corresponding path program 14 times [2024-09-15 18:54:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884872671] [2024-09-15 18:54:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:49,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:49,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:49,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:49,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884872671] [2024-09-15 18:54:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884872671] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956439233] [2024-09-15 18:54:49,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:54:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:49,678 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) [2024-09-15 18:54:49,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 18:54:49,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:49,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:54:49,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:49,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956439233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:50,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:50,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 28 [2024-09-15 18:54:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012845022] [2024-09-15 18:54:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:50,012 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 18:54:50,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 18:54:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:54:50,013 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:50,243 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2024-09-15 18:54:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 18:54:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-15 18:54:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:50,244 INFO L225 Difference]: With dead ends: 121 [2024-09-15 18:54:50,245 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 18:54:50,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:54:50,246 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:50,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 18:54:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-15 18:54:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 18:54:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-09-15 18:54:50,267 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 38 [2024-09-15 18:54:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:50,267 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-09-15 18:54:50,267 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:50,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-09-15 18:54:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:54:50,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:50,268 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, 1, 1, 1, 1] [2024-09-15 18:54:50,282 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:50,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-15 18:54:50,473 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:50,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -368487758, now seen corresponding path program 15 times [2024-09-15 18:54:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271964618] [2024-09-15 18:54:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:50,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:50,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:50,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271964618] [2024-09-15 18:54:50,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271964618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030422271] [2024-09-15 18:54:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:54:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:50,760 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) [2024-09-15 18:54:50,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 18:54:50,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:54:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:50,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:54:50,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:51,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030422271] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:51,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:51,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-15 18:54:51,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469866732] [2024-09-15 18:54:51,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:51,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:54:51,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:54:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:54:51,380 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-15 18:54:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:51,712 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2024-09-15 18:54:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:54:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 39 [2024-09-15 18:54:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:51,713 INFO L225 Difference]: With dead ends: 137 [2024-09-15 18:54:51,713 INFO L226 Difference]: Without dead ends: 124 [2024-09-15 18:54:51,714 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 18:54:51,714 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:51,714 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 482 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-15 18:54:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2024-09-15 18:54:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 102 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 18:54:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2024-09-15 18:54:51,737 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 39 [2024-09-15 18:54:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:51,737 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2024-09-15 18:54:51,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-15 18:54:51,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2024-09-15 18:54:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:54:51,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:51,738 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, 1, 1, 1, 1] [2024-09-15 18:54:51,754 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:51,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-15 18:54:51,942 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:51,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1010991045, now seen corresponding path program 16 times [2024-09-15 18:54:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:51,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348997909] [2024-09-15 18:54:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:52,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:52,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:52,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:54:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348997909] [2024-09-15 18:54:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348997909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079301411] [2024-09-15 18:54:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:54:52,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:52,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:52,217 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) [2024-09-15 18:54:52,218 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 18:54:52,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:54:52,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:52,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:54:52,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:52,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079301411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:52,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:52,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-15 18:54:52,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971168566] [2024-09-15 18:54:52,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:52,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:54:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:52,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:54:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:54:52,894 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-15 18:54:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:53,199 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2024-09-15 18:54:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:54:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 39 [2024-09-15 18:54:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:53,201 INFO L225 Difference]: With dead ends: 130 [2024-09-15 18:54:53,201 INFO L226 Difference]: Without dead ends: 119 [2024-09-15 18:54:53,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 18:54:53,202 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:53,202 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 479 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-15 18:54:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-15 18:54:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 103 states have internal predecessors, (117), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 18:54:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-15 18:54:53,227 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 39 [2024-09-15 18:54:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:53,227 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-15 18:54:53,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-15 18:54:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-15 18:54:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:54:53,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:53,228 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:53,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:53,429 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:53,429 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:53,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 464480282, now seen corresponding path program 17 times [2024-09-15 18:54:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910841743] [2024-09-15 18:54:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:53,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:54:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:53,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910841743] [2024-09-15 18:54:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910841743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877688558] [2024-09-15 18:54:53,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:54:53,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:53,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:53,520 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) [2024-09-15 18:54:53,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 18:54:53,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:54:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:53,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:54:53,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:53,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:53,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877688558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:53,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:53,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-15 18:54:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210344044] [2024-09-15 18:54:53,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:53,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 18:54:53,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 18:54:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:54:53,641 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:53,714 INFO L93 Difference]: Finished difference Result 211 states and 258 transitions. [2024-09-15 18:54:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-09-15 18:54:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:53,716 INFO L225 Difference]: With dead ends: 211 [2024-09-15 18:54:53,716 INFO L226 Difference]: Without dead ends: 139 [2024-09-15 18:54:53,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:54:53,717 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:53,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-15 18:54:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-15 18:54:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 125 states have internal predecessors, (144), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 18:54:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2024-09-15 18:54:53,745 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2024-09-15 18:54:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:53,745 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2024-09-15 18:54:53,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2024-09-15 18:54:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:54:53,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:53,746 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:53,760 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:53,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-15 18:54:53,947 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:53,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -717756427, now seen corresponding path program 18 times [2024-09-15 18:54:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:53,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675331866] [2024-09-15 18:54:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:53,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675331866] [2024-09-15 18:54:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675331866] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125532281] [2024-09-15 18:54:54,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:54:54,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:54,025 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) [2024-09-15 18:54:54,026 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 18:54:54,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:54:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:54,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:54:54,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:54,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:54:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125532281] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:54,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:54,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-15 18:54:54,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794108318] [2024-09-15 18:54:54,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:54,156 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 18:54:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 18:54:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:54:54,156 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:54,215 INFO L93 Difference]: Finished difference Result 179 states and 221 transitions. [2024-09-15 18:54:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:54:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 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 39 [2024-09-15 18:54:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:54,218 INFO L225 Difference]: With dead ends: 179 [2024-09-15 18:54:54,218 INFO L226 Difference]: Without dead ends: 161 [2024-09-15 18:54:54,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:54:54,219 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:54,219 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:54:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-15 18:54:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-09-15 18:54:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 147 states have internal predecessors, (171), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 18:54:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2024-09-15 18:54:54,261 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 39 [2024-09-15 18:54:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:54,261 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2024-09-15 18:54:54,261 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:54:54,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2024-09-15 18:54:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 18:54:54,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:54,263 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, 1, 1, 1, 1] [2024-09-15 18:54:54,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-15 18:54:54,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-15 18:54:54,463 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:54,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -223332356, now seen corresponding path program 19 times [2024-09-15 18:54:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69216104] [2024-09-15 18:54:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:54:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:54,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:54,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69216104] [2024-09-15 18:54:54,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69216104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:54,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241423171] [2024-09-15 18:54:54,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:54:54,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:54,833 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) [2024-09-15 18:54:54,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 18:54:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:54,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:54:54,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:55,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:54:55,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241423171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:55,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:55,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2024-09-15 18:54:55,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053791565] [2024-09-15 18:54:55,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:55,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:54:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:55,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:54:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:54:55,153 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:55,625 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-15 18:54:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:54:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-15 18:54:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:55,628 INFO L225 Difference]: With dead ends: 207 [2024-09-15 18:54:55,628 INFO L226 Difference]: Without dead ends: 201 [2024-09-15 18:54:55,629 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:54:55,630 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:55,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1258 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:54:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-15 18:54:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 175. [2024-09-15 18:54:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 160 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-15 18:54:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-09-15 18:54:55,679 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 40 [2024-09-15 18:54:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:55,680 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-09-15 18:54:55,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:55,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-09-15 18:54:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 18:54:55,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:55,682 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:55,702 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-15 18:54:55,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-15 18:54:55,883 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:55,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 796563891, now seen corresponding path program 20 times [2024-09-15 18:54:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:55,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200534410] [2024-09-15 18:54:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:55,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:55,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:56,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:54:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:54:56,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:56,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200534410] [2024-09-15 18:54:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200534410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653709303] [2024-09-15 18:54:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:54:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:56,141 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) [2024-09-15 18:54:56,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 18:54:56,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:54:56,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:56,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:54:56,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:54:56,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:54:56,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653709303] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:56,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:56,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-15 18:54:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243870224] [2024-09-15 18:54:56,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:56,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 18:54:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 18:54:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:54:56,626 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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) [2024-09-15 18:54:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:56,900 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-15 18:54:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:54:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 40 [2024-09-15 18:54:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:56,905 INFO L225 Difference]: With dead ends: 207 [2024-09-15 18:54:56,905 INFO L226 Difference]: Without dead ends: 193 [2024-09-15 18:54:56,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-15 18:54:56,907 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:56,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 389 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-15 18:54:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2024-09-15 18:54:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 171 states have internal predecessors, (188), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-15 18:54:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2024-09-15 18:54:56,947 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 40 [2024-09-15 18:54:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:56,947 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2024-09-15 18:54:56,948 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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) [2024-09-15 18:54:56,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2024-09-15 18:54:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 18:54:56,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:56,950 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:56,967 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:57,154 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:57,154 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:57,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1988964868, now seen corresponding path program 21 times [2024-09-15 18:54:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064703996] [2024-09-15 18:54:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:57,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:57,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:57,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:54:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064703996] [2024-09-15 18:54:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064703996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550604069] [2024-09-15 18:54:57,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:54:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:57,514 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) [2024-09-15 18:54:57,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 18:54:57,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-15 18:54:57,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:57,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:54:57,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:57,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:54:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550604069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:57,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 30 [2024-09-15 18:54:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283527757] [2024-09-15 18:54:57,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:57,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 18:54:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 18:54:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2024-09-15 18:54:57,899 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:58,201 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-09-15 18:54:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:54:58,201 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-15 18:54:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:58,203 INFO L225 Difference]: With dead ends: 205 [2024-09-15 18:54:58,203 INFO L226 Difference]: Without dead ends: 191 [2024-09-15 18:54:58,205 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:54:58,205 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:58,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 796 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:54:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-15 18:54:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2024-09-15 18:54:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 169 states have internal predecessors, (187), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-15 18:54:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2024-09-15 18:54:58,256 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 40 [2024-09-15 18:54:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:58,257 INFO L474 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2024-09-15 18:54:58,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:54:58,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2024-09-15 18:54:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 18:54:58,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:58,259 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:54:58,276 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:58,460 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:58,460 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:58,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1164125907, now seen corresponding path program 22 times [2024-09-15 18:54:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:58,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772168296] [2024-09-15 18:54:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:58,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:58,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:58,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:54:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:54:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772168296] [2024-09-15 18:54:58,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772168296] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107532781] [2024-09-15 18:54:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:54:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:58,690 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) [2024-09-15 18:54:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-15 18:54:58,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:54:58,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:58,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:54:58,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:54:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:54:58,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:54:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:54:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107532781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:54:59,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:54:59,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-15 18:54:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914071137] [2024-09-15 18:54:59,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:54:59,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 18:54:59,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:54:59,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 18:54:59,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:54:59,164 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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) [2024-09-15 18:54:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:54:59,374 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-09-15 18:54:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:54:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 40 [2024-09-15 18:54:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:54:59,376 INFO L225 Difference]: With dead ends: 199 [2024-09-15 18:54:59,376 INFO L226 Difference]: Without dead ends: 181 [2024-09-15 18:54:59,377 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-15 18:54:59,378 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:54:59,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 403 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:54:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-15 18:54:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2024-09-15 18:54:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 161 states have internal predecessors, (177), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-15 18:54:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2024-09-15 18:54:59,434 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 40 [2024-09-15 18:54:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:54:59,434 INFO L474 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2024-09-15 18:54:59,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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) [2024-09-15 18:54:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2024-09-15 18:54:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:54:59,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:54:59,436 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, 1, 1, 1, 1] [2024-09-15 18:54:59,452 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-15 18:54:59,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-15 18:54:59,640 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:54:59,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:54:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1575716773, now seen corresponding path program 23 times [2024-09-15 18:54:59,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:54:59,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851742538] [2024-09-15 18:54:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:54:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:54:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:59,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:54:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:59,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:54:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:59,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:54:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:54:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:54:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:54:59,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851742538] [2024-09-15 18:54:59,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851742538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:54:59,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639312832] [2024-09-15 18:54:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:54:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:54:59,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:54:59,930 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) [2024-09-15 18:54:59,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-15 18:54:59,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:54:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:54:59,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:54:59,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:00,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:00,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639312832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:00,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:00,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-15 18:55:00,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012783581] [2024-09-15 18:55:00,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:00,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:00,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:00,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:00,617 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2024-09-15 18:55:01,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:01,078 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2024-09-15 18:55:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:55:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 41 [2024-09-15 18:55:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:01,081 INFO L225 Difference]: With dead ends: 219 [2024-09-15 18:55:01,081 INFO L226 Difference]: Without dead ends: 206 [2024-09-15 18:55:01,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:55:01,083 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:01,083 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 507 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-15 18:55:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2024-09-15 18:55:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 179 states have internal predecessors, (197), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-15 18:55:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-09-15 18:55:01,134 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2024-09-15 18:55:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:01,134 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-09-15 18:55:01,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2024-09-15 18:55:01,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-09-15 18:55:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:55:01,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:01,137 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, 1, 1, 1, 1] [2024-09-15 18:55:01,153 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:01,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-15 18:55:01,338 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:01,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash -18482190, now seen corresponding path program 24 times [2024-09-15 18:55:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749908948] [2024-09-15 18:55:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:01,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:01,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:01,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:01,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:01,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749908948] [2024-09-15 18:55:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749908948] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345317273] [2024-09-15 18:55:01,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:01,653 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) [2024-09-15 18:55:01,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-15 18:55:01,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:55:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:01,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:55:01,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:01,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:02,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345317273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:02,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:02,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-15 18:55:02,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187738865] [2024-09-15 18:55:02,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:02,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:02,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:02,386 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2024-09-15 18:55:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:02,794 INFO L93 Difference]: Finished difference Result 212 states and 253 transitions. [2024-09-15 18:55:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:55:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 41 [2024-09-15 18:55:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:02,796 INFO L225 Difference]: With dead ends: 212 [2024-09-15 18:55:02,796 INFO L226 Difference]: Without dead ends: 201 [2024-09-15 18:55:02,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:55:02,798 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:02,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-15 18:55:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-09-15 18:55:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 160 states have (on average 1.2375) internal successors, (198), 180 states have internal predecessors, (198), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-15 18:55:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2024-09-15 18:55:02,861 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 41 [2024-09-15 18:55:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:02,862 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2024-09-15 18:55:02,862 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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) [2024-09-15 18:55:02,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2024-09-15 18:55:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:55:02,865 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:02,865 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:02,882 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:03,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-15 18:55:03,069 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1486012337, now seen corresponding path program 25 times [2024-09-15 18:55:03,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:03,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470324894] [2024-09-15 18:55:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:03,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470324894] [2024-09-15 18:55:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470324894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50404738] [2024-09-15 18:55:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:03,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:03,149 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) [2024-09-15 18:55:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-15 18:55:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:55:03,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50404738] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:03,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-15 18:55:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596995897] [2024-09-15 18:55:03,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:03,284 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:55:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:55:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:55:03,285 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:03,380 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2024-09-15 18:55:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:55:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 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 41 [2024-09-15 18:55:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:03,382 INFO L225 Difference]: With dead ends: 214 [2024-09-15 18:55:03,382 INFO L226 Difference]: Without dead ends: 198 [2024-09-15 18:55:03,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:55:03,384 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:03,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 139 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-09-15 18:55:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2024-09-15 18:55:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 171 states have internal predecessors, (189), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 18:55:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-09-15 18:55:03,449 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 41 [2024-09-15 18:55:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:03,449 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-09-15 18:55:03,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:03,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-09-15 18:55:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 18:55:03,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:03,451 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:03,652 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-15 18:55:03,652 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:03,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1010741786, now seen corresponding path program 26 times [2024-09-15 18:55:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894568827] [2024-09-15 18:55:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:55:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:03,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894568827] [2024-09-15 18:55:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894568827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301452053] [2024-09-15 18:55:03,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:03,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:03,743 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) [2024-09-15 18:55:03,744 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-15 18:55:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:03,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:55:03,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301452053] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:03,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:03,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-15 18:55:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714467698] [2024-09-15 18:55:03,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:03,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:55:03,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:03,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:55:03,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:55:03,871 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:03,947 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2024-09-15 18:55:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 18:55:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-09-15 18:55:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:03,950 INFO L225 Difference]: With dead ends: 300 [2024-09-15 18:55:03,950 INFO L226 Difference]: Without dead ends: 193 [2024-09-15 18:55:03,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:55:03,952 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:03,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-15 18:55:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-15 18:55:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 18:55:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2024-09-15 18:55:04,013 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 41 [2024-09-15 18:55:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:04,013 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2024-09-15 18:55:04,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:04,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2024-09-15 18:55:04,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:55:04,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:04,015 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, 1, 1, 1, 1] [2024-09-15 18:55:04,032 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:04,216 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:04,216 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:04,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash 479671077, now seen corresponding path program 27 times [2024-09-15 18:55:04,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:04,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008255633] [2024-09-15 18:55:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:04,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:04,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:04,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:04,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:04,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:04,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008255633] [2024-09-15 18:55:04,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008255633] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:04,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690409066] [2024-09-15 18:55:04,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:04,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:04,618 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) [2024-09-15 18:55:04,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-15 18:55:04,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:55:04,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:04,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:55:04,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:04,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:04,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690409066] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:04,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:04,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 32 [2024-09-15 18:55:04,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957951100] [2024-09-15 18:55:04,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:04,980 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:55:04,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:55:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:55:04,981 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:05,503 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2024-09-15 18:55:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 18:55:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-15 18:55:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:05,505 INFO L225 Difference]: With dead ends: 245 [2024-09-15 18:55:05,505 INFO L226 Difference]: Without dead ends: 239 [2024-09-15 18:55:05,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:05,507 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:05,507 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1488 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-15 18:55:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2024-09-15 18:55:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 171 states have (on average 1.2105263157894737) internal successors, (207), 189 states have internal predecessors, (207), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-15 18:55:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2024-09-15 18:55:05,562 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 42 [2024-09-15 18:55:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:05,562 INFO L474 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2024-09-15 18:55:05,563 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:05,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2024-09-15 18:55:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:55:05,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:05,565 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:05,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-15 18:55:05,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-15 18:55:05,765 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:05,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash -432732607, now seen corresponding path program 28 times [2024-09-15 18:55:05,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:05,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368390285] [2024-09-15 18:55:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:05,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:05,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:05,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:05,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:06,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368390285] [2024-09-15 18:55:06,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368390285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:06,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333674681] [2024-09-15 18:55:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:06,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:06,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:06,141 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) [2024-09-15 18:55:06,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-15 18:55:06,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:06,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:06,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:55:06,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:06,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333674681] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:06,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 32 [2024-09-15 18:55:06,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793144882] [2024-09-15 18:55:06,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:06,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:55:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:55:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:55:06,513 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:06,842 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-15 18:55:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:55:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-15 18:55:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:06,844 INFO L225 Difference]: With dead ends: 213 [2024-09-15 18:55:06,844 INFO L226 Difference]: Without dead ends: 193 [2024-09-15 18:55:06,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:06,846 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:06,846 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1090 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-15 18:55:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-15 18:55:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2024-09-15 18:55:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2024-09-15 18:55:06,885 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 42 [2024-09-15 18:55:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:06,886 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2024-09-15 18:55:06,886 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:06,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2024-09-15 18:55:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:55:06,888 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:06,888 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:06,903 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:07,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-15 18:55:07,088 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:07,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -49232091, now seen corresponding path program 29 times [2024-09-15 18:55:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732839673] [2024-09-15 18:55:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:07,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:07,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:07,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:07,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732839673] [2024-09-15 18:55:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732839673] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025207097] [2024-09-15 18:55:07,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:55:07,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:07,428 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) [2024-09-15 18:55:07,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-15 18:55:07,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:55:07,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:07,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:55:07,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:07,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025207097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:07,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2024-09-15 18:55:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602257240] [2024-09-15 18:55:07,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:07,843 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:55:07,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:55:07,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:55:07,844 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:08,111 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2024-09-15 18:55:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:55:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-15 18:55:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:08,113 INFO L225 Difference]: With dead ends: 209 [2024-09-15 18:55:08,113 INFO L226 Difference]: Without dead ends: 203 [2024-09-15 18:55:08,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:08,114 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:08,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 709 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-15 18:55:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-09-15 18:55:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.2181818181818183) internal successors, (201), 183 states have internal predecessors, (201), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-15 18:55:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2024-09-15 18:55:08,174 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 42 [2024-09-15 18:55:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:08,174 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2024-09-15 18:55:08,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:08,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2024-09-15 18:55:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:55:08,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:08,176 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, 1, 1, 1, 1] [2024-09-15 18:55:08,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-15 18:55:08,376 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-15 18:55:08,377 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:08,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1257446830, now seen corresponding path program 30 times [2024-09-15 18:55:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830345619] [2024-09-15 18:55:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:08,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:08,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:08,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830345619] [2024-09-15 18:55:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830345619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235828547] [2024-09-15 18:55:08,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:08,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:08,710 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) [2024-09-15 18:55:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-15 18:55:08,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:55:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:08,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:55:08,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:09,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:09,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235828547] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:09,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:09,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-15 18:55:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635178774] [2024-09-15 18:55:09,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:09,599 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:55:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:55:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:09,600 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2024-09-15 18:55:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:10,178 INFO L93 Difference]: Finished difference Result 243 states and 289 transitions. [2024-09-15 18:55:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:55:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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 43 [2024-09-15 18:55:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:10,180 INFO L225 Difference]: With dead ends: 243 [2024-09-15 18:55:10,180 INFO L226 Difference]: Without dead ends: 230 [2024-09-15 18:55:10,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 18:55:10,182 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:10,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 560 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-15 18:55:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-09-15 18:55:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 203 states have internal predecessors, (223), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-09-15 18:55:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2024-09-15 18:55:10,250 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 43 [2024-09-15 18:55:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:10,251 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2024-09-15 18:55:10,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2024-09-15 18:55:10,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2024-09-15 18:55:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:55:10,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:10,253 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, 1, 1, 1, 1] [2024-09-15 18:55:10,269 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-15 18:55:10,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-15 18:55:10,454 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:10,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -227815013, now seen corresponding path program 31 times [2024-09-15 18:55:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:10,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034144640] [2024-09-15 18:55:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:10,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:10,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:10,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034144640] [2024-09-15 18:55:10,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034144640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415077116] [2024-09-15 18:55:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:10,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:10,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:10,809 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) [2024-09-15 18:55:10,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-15 18:55:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:10,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:55:10,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:11,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:11,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415077116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:11,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:11,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-15 18:55:11,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740760494] [2024-09-15 18:55:11,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:11,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:55:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:55:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:11,841 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2024-09-15 18:55:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:12,450 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2024-09-15 18:55:12,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:55:12,450 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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 43 [2024-09-15 18:55:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:12,452 INFO L225 Difference]: With dead ends: 236 [2024-09-15 18:55:12,452 INFO L226 Difference]: Without dead ends: 225 [2024-09-15 18:55:12,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 18:55:12,454 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:12,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 714 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-15 18:55:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-09-15 18:55:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 204 states have internal predecessors, (224), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-15 18:55:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 263 transitions. [2024-09-15 18:55:12,524 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 263 transitions. Word has length 43 [2024-09-15 18:55:12,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:12,525 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 263 transitions. [2024-09-15 18:55:12,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 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) [2024-09-15 18:55:12,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 263 transitions. [2024-09-15 18:55:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:55:12,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:12,527 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:12,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-15 18:55:12,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:12,732 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:12,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:12,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1451316090, now seen corresponding path program 32 times [2024-09-15 18:55:12,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:12,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558362976] [2024-09-15 18:55:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:12,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:12,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:12,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:12,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:12,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:12,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558362976] [2024-09-15 18:55:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558362976] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:12,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715711093] [2024-09-15 18:55:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:12,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:12,827 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) [2024-09-15 18:55:12,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-15 18:55:12,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:12,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 18:55:12,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:12,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715711093] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:12,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-15 18:55:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728868579] [2024-09-15 18:55:12,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:12,969 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 18:55:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 18:55:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:55:12,970 INFO L87 Difference]: Start difference. First operand 223 states and 263 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:13,088 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2024-09-15 18:55:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 18:55:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-09-15 18:55:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:13,091 INFO L225 Difference]: With dead ends: 391 [2024-09-15 18:55:13,091 INFO L226 Difference]: Without dead ends: 261 [2024-09-15 18:55:13,093 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:55:13,093 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:13,094 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-09-15 18:55:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-09-15 18:55:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 222 states have (on average 1.2117117117117118) internal successors, (269), 242 states have internal predecessors, (269), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-15 18:55:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2024-09-15 18:55:13,175 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 43 [2024-09-15 18:55:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:13,176 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2024-09-15 18:55:13,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2024-09-15 18:55:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:55:13,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:13,178 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:13,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-15 18:55:13,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-09-15 18:55:13,379 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:13,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash -397169103, now seen corresponding path program 33 times [2024-09-15 18:55:13,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:13,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112117654] [2024-09-15 18:55:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:13,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:13,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:13,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112117654] [2024-09-15 18:55:13,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112117654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321375924] [2024-09-15 18:55:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:13,455 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) [2024-09-15 18:55:13,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-15 18:55:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:55:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:13,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 18:55:13,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:13,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:55:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321375924] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:13,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:13,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-15 18:55:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777630462] [2024-09-15 18:55:13,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:13,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 18:55:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 18:55:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:55:13,613 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:13,733 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2024-09-15 18:55:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 18:55:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 43 [2024-09-15 18:55:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:13,735 INFO L225 Difference]: With dead ends: 323 [2024-09-15 18:55:13,735 INFO L226 Difference]: Without dead ends: 299 [2024-09-15 18:55:13,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:55:13,736 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:13,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-15 18:55:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-15 18:55:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-15 18:55:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 353 transitions. [2024-09-15 18:55:13,805 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 353 transitions. Word has length 43 [2024-09-15 18:55:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:13,806 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 353 transitions. [2024-09-15 18:55:13,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:13,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 353 transitions. [2024-09-15 18:55:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:55:13,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:13,808 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, 1, 1, 1, 1] [2024-09-15 18:55:13,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-15 18:55:14,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-15 18:55:14,009 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:14,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1714679140, now seen corresponding path program 34 times [2024-09-15 18:55:14,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:14,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521314451] [2024-09-15 18:55:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:14,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:14,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:14,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:14,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521314451] [2024-09-15 18:55:14,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521314451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:14,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227586356] [2024-09-15 18:55:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:14,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:14,473 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) [2024-09-15 18:55:14,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-15 18:55:14,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:14,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 18:55:14,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:14,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:14,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227586356] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:14,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:14,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 34 [2024-09-15 18:55:14,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284058554] [2024-09-15 18:55:14,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:14,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-15 18:55:14,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-15 18:55:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:55:14,799 INFO L87 Difference]: Start difference. First operand 299 states and 353 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:15,412 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2024-09-15 18:55:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:55:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-15 18:55:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:15,415 INFO L225 Difference]: With dead ends: 363 [2024-09-15 18:55:15,415 INFO L226 Difference]: Without dead ends: 357 [2024-09-15 18:55:15,417 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:55:15,417 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:15,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1994 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-09-15 18:55:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 313. [2024-09-15 18:55:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 271 states have (on average 1.2066420664206643) internal successors, (327), 293 states have internal predecessors, (327), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-09-15 18:55:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2024-09-15 18:55:15,510 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 44 [2024-09-15 18:55:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:15,518 INFO L474 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2024-09-15 18:55:15,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2024-09-15 18:55:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:55:15,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:15,521 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:15,538 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:15,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:15,722 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:15,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 403829916, now seen corresponding path program 35 times [2024-09-15 18:55:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:15,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312610853] [2024-09-15 18:55:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:15,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:15,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:15,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:16,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312610853] [2024-09-15 18:55:16,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312610853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874720197] [2024-09-15 18:55:16,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:55:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:16,086 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) [2024-09-15 18:55:16,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-15 18:55:16,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:55:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:16,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-15 18:55:16,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:16,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874720197] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:16,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 34 [2024-09-15 18:55:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586505733] [2024-09-15 18:55:16,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:16,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-15 18:55:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-15 18:55:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1043, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:55:16,422 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:16,865 INFO L93 Difference]: Finished difference Result 319 states and 375 transitions. [2024-09-15 18:55:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 18:55:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-15 18:55:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:16,867 INFO L225 Difference]: With dead ends: 319 [2024-09-15 18:55:16,867 INFO L226 Difference]: Without dead ends: 299 [2024-09-15 18:55:16,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:55:16,869 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:16,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1347 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-15 18:55:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-15 18:55:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-15 18:55:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 354 transitions. [2024-09-15 18:55:16,964 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 354 transitions. Word has length 44 [2024-09-15 18:55:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:16,964 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 354 transitions. [2024-09-15 18:55:16,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 354 transitions. [2024-09-15 18:55:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:55:16,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:16,967 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:16,982 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:17,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-15 18:55:17,167 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:17,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1740504941, now seen corresponding path program 36 times [2024-09-15 18:55:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:17,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146106493] [2024-09-15 18:55:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:17,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:17,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:17,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:55:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:55:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146106493] [2024-09-15 18:55:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146106493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570763588] [2024-09-15 18:55:17,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:17,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:17,405 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) [2024-09-15 18:55:17,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-15 18:55:17,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:55:17,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:17,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:55:17,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:55:17,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:55:18,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570763588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:18,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:18,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-15 18:55:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123585643] [2024-09-15 18:55:18,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:18,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:55:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:55:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:55:18,023 INFO L87 Difference]: Start difference. First operand 299 states and 354 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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) [2024-09-15 18:55:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:18,365 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2024-09-15 18:55:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:55:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 44 [2024-09-15 18:55:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:18,369 INFO L225 Difference]: With dead ends: 343 [2024-09-15 18:55:18,369 INFO L226 Difference]: Without dead ends: 328 [2024-09-15 18:55:18,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 18:55:18,371 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:18,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 454 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-09-15 18:55:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2024-09-15 18:55:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 300 states have internal predecessors, (323), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-15 18:55:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 383 transitions. [2024-09-15 18:55:18,449 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 383 transitions. Word has length 44 [2024-09-15 18:55:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:18,449 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 383 transitions. [2024-09-15 18:55:18,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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) [2024-09-15 18:55:18,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 383 transitions. [2024-09-15 18:55:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:55:18,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:18,451 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:18,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:18,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:18,651 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:18,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1448463004, now seen corresponding path program 37 times [2024-09-15 18:55:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221842144] [2024-09-15 18:55:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:18,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:18,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:18,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221842144] [2024-09-15 18:55:18,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221842144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:18,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268011896] [2024-09-15 18:55:18,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:18,984 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) [2024-09-15 18:55:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-15 18:55:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:19,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:55:19,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:19,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268011896] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:19,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:19,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 34 [2024-09-15 18:55:19,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478365927] [2024-09-15 18:55:19,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:19,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-15 18:55:19,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-15 18:55:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:55:19,393 INFO L87 Difference]: Start difference. First operand 324 states and 383 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:19,761 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2024-09-15 18:55:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:55:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-15 18:55:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:19,763 INFO L225 Difference]: With dead ends: 340 [2024-09-15 18:55:19,763 INFO L226 Difference]: Without dead ends: 325 [2024-09-15 18:55:19,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:55:19,766 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:19,766 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 930 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-09-15 18:55:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2024-09-15 18:55:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 267 states have (on average 1.202247191011236) internal successors, (321), 297 states have internal predecessors, (321), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-15 18:55:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 381 transitions. [2024-09-15 18:55:19,871 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 381 transitions. Word has length 44 [2024-09-15 18:55:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:19,871 INFO L474 AbstractCegarLoop]: Abstraction has 321 states and 381 transitions. [2024-09-15 18:55:19,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:19,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 381 transitions. [2024-09-15 18:55:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 18:55:19,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:19,874 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:19,891 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:20,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-15 18:55:20,076 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:20,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -296415821, now seen corresponding path program 38 times [2024-09-15 18:55:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591971914] [2024-09-15 18:55:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:20,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:20,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:20,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:55:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:20,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591971914] [2024-09-15 18:55:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591971914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:20,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824748288] [2024-09-15 18:55:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:20,302 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) [2024-09-15 18:55:20,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-15 18:55:20,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:20,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:55:20,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:55:20,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 18:55:20,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824748288] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:20,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-15 18:55:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739590909] [2024-09-15 18:55:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:20,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:55:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:55:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:55:20,845 INFO L87 Difference]: Start difference. First operand 321 states and 381 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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) [2024-09-15 18:55:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:21,202 INFO L93 Difference]: Finished difference Result 333 states and 392 transitions. [2024-09-15 18:55:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:55:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 44 [2024-09-15 18:55:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:21,204 INFO L225 Difference]: With dead ends: 333 [2024-09-15 18:55:21,204 INFO L226 Difference]: Without dead ends: 313 [2024-09-15 18:55:21,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 18:55:21,207 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:21,207 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 446 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-09-15 18:55:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2024-09-15 18:55:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 257 states have (on average 1.2023346303501945) internal successors, (309), 287 states have internal predecessors, (309), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2024-09-15 18:55:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2024-09-15 18:55:21,312 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 44 [2024-09-15 18:55:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:21,312 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2024-09-15 18:55:21,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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) [2024-09-15 18:55:21,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2024-09-15 18:55:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:55:21,314 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:21,314 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, 1, 1, 1, 1] [2024-09-15 18:55:21,326 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:21,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-15 18:55:21,515 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:21,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:21,515 INFO L85 PathProgramCache]: Analyzing trace with hash -562826821, now seen corresponding path program 39 times [2024-09-15 18:55:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:21,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018583823] [2024-09-15 18:55:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:21,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:21,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:21,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:21,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:21,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018583823] [2024-09-15 18:55:21,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018583823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558452367] [2024-09-15 18:55:21,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:21,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:21,849 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) [2024-09-15 18:55:21,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-15 18:55:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 18:55:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:21,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:55:21,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:22,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:22,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558452367] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:22,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:22,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-15 18:55:22,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129440377] [2024-09-15 18:55:22,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:22,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:55:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:55:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:55:22,990 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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) [2024-09-15 18:55:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:23,989 INFO L93 Difference]: Finished difference Result 371 states and 438 transitions. [2024-09-15 18:55:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 18:55:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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 45 [2024-09-15 18:55:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:23,992 INFO L225 Difference]: With dead ends: 371 [2024-09-15 18:55:23,992 INFO L226 Difference]: Without dead ends: 358 [2024-09-15 18:55:23,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-15 18:55:23,994 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:23,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 732 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-09-15 18:55:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2024-09-15 18:55:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 290 states have (on average 1.2) internal successors, (348), 324 states have internal predecessors, (348), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2024-09-15 18:55:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 412 transitions. [2024-09-15 18:55:24,121 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 412 transitions. Word has length 45 [2024-09-15 18:55:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:24,121 INFO L474 AbstractCegarLoop]: Abstraction has 350 states and 412 transitions. [2024-09-15 18:55:24,121 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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) [2024-09-15 18:55:24,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 412 transitions. [2024-09-15 18:55:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:55:24,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:24,125 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, 1, 1, 1, 1] [2024-09-15 18:55:24,158 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-15 18:55:24,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-15 18:55:24,326 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:24,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1290988434, now seen corresponding path program 40 times [2024-09-15 18:55:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416201403] [2024-09-15 18:55:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:24,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:24,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:24,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:24,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:24,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416201403] [2024-09-15 18:55:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416201403] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056892738] [2024-09-15 18:55:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:24,629 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) [2024-09-15 18:55:24,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-15 18:55:24,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:24,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:24,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:55:24,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:25,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:25,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056892738] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:25,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:25,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-15 18:55:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29103285] [2024-09-15 18:55:25,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:25,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:55:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:55:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:55:25,677 INFO L87 Difference]: Start difference. First operand 350 states and 412 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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) [2024-09-15 18:55:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:26,504 INFO L93 Difference]: Finished difference Result 364 states and 426 transitions. [2024-09-15 18:55:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 18:55:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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 45 [2024-09-15 18:55:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:26,507 INFO L225 Difference]: With dead ends: 364 [2024-09-15 18:55:26,507 INFO L226 Difference]: Without dead ends: 353 [2024-09-15 18:55:26,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-15 18:55:26,510 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:26,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 799 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-09-15 18:55:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2024-09-15 18:55:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 291 states have (on average 1.1993127147766323) internal successors, (349), 325 states have internal predecessors, (349), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-15 18:55:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 410 transitions. [2024-09-15 18:55:26,636 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 410 transitions. Word has length 45 [2024-09-15 18:55:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:26,636 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 410 transitions. [2024-09-15 18:55:26,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 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) [2024-09-15 18:55:26,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 410 transitions. [2024-09-15 18:55:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:55:26,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:26,640 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2024-09-15 18:55:26,655 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:26,841 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-15 18:55:26,841 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:26,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 973220789, now seen corresponding path program 41 times [2024-09-15 18:55:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:26,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458825002] [2024-09-15 18:55:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:26,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:26,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:26,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:26,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458825002] [2024-09-15 18:55:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458825002] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720955085] [2024-09-15 18:55:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:55:26,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:26,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:26,920 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) [2024-09-15 18:55:26,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-15 18:55:26,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:55:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:26,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:55:26,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:27,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720955085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:27,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:27,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-15 18:55:27,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899143686] [2024-09-15 18:55:27,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:27,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:55:27,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:55:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:55:27,094 INFO L87 Difference]: Start difference. First operand 351 states and 410 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:27,253 INFO L93 Difference]: Finished difference Result 372 states and 435 transitions. [2024-09-15 18:55:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 18:55:27,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 45 [2024-09-15 18:55:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:27,256 INFO L225 Difference]: With dead ends: 372 [2024-09-15 18:55:27,257 INFO L226 Difference]: Without dead ends: 352 [2024-09-15 18:55:27,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:55:27,259 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:27,259 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-15 18:55:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2024-09-15 18:55:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 288 states have (on average 1.1875) internal successors, (342), 318 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-15 18:55:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 395 transitions. [2024-09-15 18:55:27,360 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 395 transitions. Word has length 45 [2024-09-15 18:55:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:27,360 INFO L474 AbstractCegarLoop]: Abstraction has 342 states and 395 transitions. [2024-09-15 18:55:27,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:27,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 395 transitions. [2024-09-15 18:55:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 18:55:27,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:27,363 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2024-09-15 18:55:27,379 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-15 18:55:27,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:27,563 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:27,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -85619334, now seen corresponding path program 42 times [2024-09-15 18:55:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344377233] [2024-09-15 18:55:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:27,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:27,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:27,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:55:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:27,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344377233] [2024-09-15 18:55:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344377233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242667636] [2024-09-15 18:55:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:27,676 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) [2024-09-15 18:55:27,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-15 18:55:27,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:55:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:27,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:55:27,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:27,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242667636] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:27,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-15 18:55:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573478929] [2024-09-15 18:55:27,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:27,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:55:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:55:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:55:27,843 INFO L87 Difference]: Start difference. First operand 342 states and 395 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:28,010 INFO L93 Difference]: Finished difference Result 535 states and 612 transitions. [2024-09-15 18:55:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 18:55:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-09-15 18:55:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:28,015 INFO L225 Difference]: With dead ends: 535 [2024-09-15 18:55:28,015 INFO L226 Difference]: Without dead ends: 349 [2024-09-15 18:55:28,018 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:55:28,018 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:28,018 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 217 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-15 18:55:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-15 18:55:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-15 18:55:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 402 transitions. [2024-09-15 18:55:28,179 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 402 transitions. Word has length 45 [2024-09-15 18:55:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:28,179 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 402 transitions. [2024-09-15 18:55:28,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:28,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 402 transitions. [2024-09-15 18:55:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:55:28,183 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:28,183 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, 1, 1, 1, 1] [2024-09-15 18:55:28,196 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:28,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:28,383 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:28,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1876412539, now seen corresponding path program 43 times [2024-09-15 18:55:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201958166] [2024-09-15 18:55:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:28,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:28,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:28,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:28,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201958166] [2024-09-15 18:55:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201958166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485173854] [2024-09-15 18:55:28,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:28,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:28,822 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) [2024-09-15 18:55:28,822 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-15 18:55:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:28,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:55:28,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:29,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485173854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:29,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 36 [2024-09-15 18:55:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14739650] [2024-09-15 18:55:29,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:29,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:29,188 INFO L87 Difference]: Start difference. First operand 349 states and 402 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:29,880 INFO L93 Difference]: Finished difference Result 419 states and 483 transitions. [2024-09-15 18:55:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:55:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-15 18:55:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:29,883 INFO L225 Difference]: With dead ends: 419 [2024-09-15 18:55:29,883 INFO L226 Difference]: Without dead ends: 413 [2024-09-15 18:55:29,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:29,887 INFO L434 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:29,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 2246 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:55:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-09-15 18:55:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 363. [2024-09-15 18:55:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 306 states have (on average 1.1830065359477124) internal successors, (362), 338 states have internal predecessors, (362), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2024-09-15 18:55:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2024-09-15 18:55:30,026 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 46 [2024-09-15 18:55:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:30,026 INFO L474 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2024-09-15 18:55:30,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:30,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2024-09-15 18:55:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:55:30,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:30,029 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:30,046 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-15 18:55:30,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:30,234 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:30,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash -493129823, now seen corresponding path program 44 times [2024-09-15 18:55:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:30,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288087279] [2024-09-15 18:55:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:30,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:30,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:30,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:30,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288087279] [2024-09-15 18:55:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288087279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806360158] [2024-09-15 18:55:30,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:30,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:30,649 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) [2024-09-15 18:55:30,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-15 18:55:30,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:30,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 18:55:30,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:30,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:31,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806360158] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:31,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:31,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-09-15 18:55:31,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503841656] [2024-09-15 18:55:31,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:31,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:31,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:31,038 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:31,562 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2024-09-15 18:55:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:55:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-15 18:55:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:31,564 INFO L225 Difference]: With dead ends: 369 [2024-09-15 18:55:31,564 INFO L226 Difference]: Without dead ends: 349 [2024-09-15 18:55:31,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:31,567 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:31,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1707 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-15 18:55:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-15 18:55:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2024-09-15 18:55:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2024-09-15 18:55:31,662 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 46 [2024-09-15 18:55:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:31,662 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2024-09-15 18:55:31,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:31,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2024-09-15 18:55:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:55:31,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:31,665 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:31,677 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:31,865 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:31,865 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:31,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash -573359227, now seen corresponding path program 45 times [2024-09-15 18:55:31,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:31,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924863415] [2024-09-15 18:55:31,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:31,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:31,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:31,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:32,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:32,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924863415] [2024-09-15 18:55:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924863415] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485325353] [2024-09-15 18:55:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:32,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:32,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:32,257 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) [2024-09-15 18:55:32,259 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-15 18:55:32,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:55:32,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:32,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:55:32,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:32,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:32,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485325353] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:32,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:32,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 36 [2024-09-15 18:55:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205187842] [2024-09-15 18:55:32,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:32,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:32,694 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:33,127 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2024-09-15 18:55:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 18:55:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-15 18:55:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:33,129 INFO L225 Difference]: With dead ends: 355 [2024-09-15 18:55:33,129 INFO L226 Difference]: Without dead ends: 333 [2024-09-15 18:55:33,131 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:33,131 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:33,131 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1301 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-09-15 18:55:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2024-09-15 18:55:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.1843971631205674) internal successors, (334), 310 states have internal predecessors, (334), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2024-09-15 18:55:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 385 transitions. [2024-09-15 18:55:33,280 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 385 transitions. Word has length 46 [2024-09-15 18:55:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:33,280 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 385 transitions. [2024-09-15 18:55:33,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:33,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 385 transitions. [2024-09-15 18:55:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:55:33,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:33,283 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:33,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-15 18:55:33,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:33,484 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:33,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1234099105, now seen corresponding path program 46 times [2024-09-15 18:55:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445124775] [2024-09-15 18:55:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:33,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:33,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:33,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:33,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:33,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445124775] [2024-09-15 18:55:33,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445124775] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:33,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768722287] [2024-09-15 18:55:33,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:33,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:33,766 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) [2024-09-15 18:55:33,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-15 18:55:33,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:33,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:55:33,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:34,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768722287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:34,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:34,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2024-09-15 18:55:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819078212] [2024-09-15 18:55:34,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:34,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:55:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:55:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:55:34,201 INFO L87 Difference]: Start difference. First operand 333 states and 385 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:34,557 INFO L93 Difference]: Finished difference Result 349 states and 404 transitions. [2024-09-15 18:55:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:55:34,557 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-15 18:55:34,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:34,560 INFO L225 Difference]: With dead ends: 349 [2024-09-15 18:55:34,560 INFO L226 Difference]: Without dead ends: 343 [2024-09-15 18:55:34,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:55:34,562 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:34,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 733 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-15 18:55:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2024-09-15 18:55:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 287 states have (on average 1.1881533101045296) internal successors, (341), 317 states have internal predecessors, (341), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2024-09-15 18:55:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 396 transitions. [2024-09-15 18:55:34,663 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 396 transitions. Word has length 46 [2024-09-15 18:55:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:34,663 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 396 transitions. [2024-09-15 18:55:34,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:34,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 396 transitions. [2024-09-15 18:55:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 18:55:34,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:34,667 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, 1, 1, 1, 1] [2024-09-15 18:55:34,684 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:34,867 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:34,868 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:34,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1281594894, now seen corresponding path program 47 times [2024-09-15 18:55:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:34,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459144784] [2024-09-15 18:55:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:34,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:34,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:35,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:35,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:35,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459144784] [2024-09-15 18:55:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459144784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:35,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380545341] [2024-09-15 18:55:35,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:55:35,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:35,293 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) [2024-09-15 18:55:35,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-15 18:55:35,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:55:35,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:35,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 18:55:35,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:35,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380545341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:36,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:36,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-15 18:55:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636539432] [2024-09-15 18:55:36,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:36,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-15 18:55:36,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-15 18:55:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:55:36,545 INFO L87 Difference]: Start difference. First operand 341 states and 396 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2024-09-15 18:55:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:37,636 INFO L93 Difference]: Finished difference Result 403 states and 471 transitions. [2024-09-15 18:55:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 18:55:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 47 [2024-09-15 18:55:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:37,640 INFO L225 Difference]: With dead ends: 403 [2024-09-15 18:55:37,640 INFO L226 Difference]: Without dead ends: 390 [2024-09-15 18:55:37,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-15 18:55:37,644 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:37,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 774 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:55:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-09-15 18:55:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 382. [2024-09-15 18:55:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 322 states have (on average 1.186335403726708) internal successors, (382), 356 states have internal predecessors, (382), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2024-09-15 18:55:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2024-09-15 18:55:37,794 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 47 [2024-09-15 18:55:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:37,794 INFO L474 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2024-09-15 18:55:37,794 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2024-09-15 18:55:37,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2024-09-15 18:55:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 18:55:37,797 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:37,797 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, 1, 1, 1, 1] [2024-09-15 18:55:37,809 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-15 18:55:37,997 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-15 18:55:37,997 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:37,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 352103163, now seen corresponding path program 48 times [2024-09-15 18:55:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066186846] [2024-09-15 18:55:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:38,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:38,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:38,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066186846] [2024-09-15 18:55:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066186846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127976836] [2024-09-15 18:55:38,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:38,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:38,363 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) [2024-09-15 18:55:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-15 18:55:38,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:55:38,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:38,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 18:55:38,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:38,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127976836] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:39,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-15 18:55:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076448944] [2024-09-15 18:55:39,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:39,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-15 18:55:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-15 18:55:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:55:39,647 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2024-09-15 18:55:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:40,698 INFO L93 Difference]: Finished difference Result 396 states and 459 transitions. [2024-09-15 18:55:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 18:55:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 47 [2024-09-15 18:55:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:40,701 INFO L225 Difference]: With dead ends: 396 [2024-09-15 18:55:40,701 INFO L226 Difference]: Without dead ends: 385 [2024-09-15 18:55:40,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-15 18:55:40,704 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:40,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 829 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-15 18:55:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2024-09-15 18:55:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 323 states have (on average 1.1857585139318885) internal successors, (383), 357 states have internal predecessors, (383), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-15 18:55:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-15 18:55:40,835 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 47 [2024-09-15 18:55:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:40,835 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-15 18:55:40,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2024-09-15 18:55:40,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-15 18:55:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 18:55:40,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:40,840 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:40,857 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-15 18:55:41,040 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-15 18:55:41,041 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:41,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash -804302246, now seen corresponding path program 49 times [2024-09-15 18:55:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420218630] [2024-09-15 18:55:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420218630] [2024-09-15 18:55:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420218630] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246697930] [2024-09-15 18:55:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:41,144 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) [2024-09-15 18:55:41,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-15 18:55:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:55:41,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:41,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246697930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:41,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-15 18:55:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096712333] [2024-09-15 18:55:41,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:41,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:55:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:55:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:55:41,329 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:41,560 INFO L93 Difference]: Finished difference Result 654 states and 759 transitions. [2024-09-15 18:55:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 18:55:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-09-15 18:55:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:41,566 INFO L225 Difference]: With dead ends: 654 [2024-09-15 18:55:41,566 INFO L226 Difference]: Without dead ends: 441 [2024-09-15 18:55:41,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:55:41,585 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:41,585 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:55:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-09-15 18:55:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2024-09-15 18:55:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 381 states have (on average 1.1811023622047243) internal successors, (450), 415 states have internal predecessors, (450), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-15 18:55:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 510 transitions. [2024-09-15 18:55:41,713 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 510 transitions. Word has length 47 [2024-09-15 18:55:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:41,713 INFO L474 AbstractCegarLoop]: Abstraction has 441 states and 510 transitions. [2024-09-15 18:55:41,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 510 transitions. [2024-09-15 18:55:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 18:55:41,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:41,716 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:41,728 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-15 18:55:41,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-15 18:55:41,916 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:41,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 731392309, now seen corresponding path program 50 times [2024-09-15 18:55:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282942313] [2024-09-15 18:55:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:41,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282942313] [2024-09-15 18:55:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282942313] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864594144] [2024-09-15 18:55:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:42,009 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) [2024-09-15 18:55:42,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-15 18:55:42,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:42,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:42,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:55:42,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:42,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:55:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864594144] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:42,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:42,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-15 18:55:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039236243] [2024-09-15 18:55:42,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:42,246 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:55:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:55:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:55:42,246 INFO L87 Difference]: Start difference. First operand 441 states and 510 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:42,596 INFO L93 Difference]: Finished difference Result 529 states and 623 transitions. [2024-09-15 18:55:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 18:55:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 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 47 [2024-09-15 18:55:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:42,600 INFO L225 Difference]: With dead ends: 529 [2024-09-15 18:55:42,600 INFO L226 Difference]: Without dead ends: 499 [2024-09-15 18:55:42,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:55:42,604 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:42,605 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:55:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-15 18:55:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-15 18:55:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-15 18:55:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 577 transitions. [2024-09-15 18:55:42,801 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 577 transitions. Word has length 47 [2024-09-15 18:55:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:42,801 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 577 transitions. [2024-09-15 18:55:42,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:55:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 577 transitions. [2024-09-15 18:55:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:42,805 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:42,805 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, 1, 1, 1, 1] [2024-09-15 18:55:42,818 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:43,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-15 18:55:43,006 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:43,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash -917084868, now seen corresponding path program 51 times [2024-09-15 18:55:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:43,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016127372] [2024-09-15 18:55:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:43,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:43,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:43,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016127372] [2024-09-15 18:55:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016127372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023577308] [2024-09-15 18:55:43,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:43,453 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) [2024-09-15 18:55:43,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-15 18:55:43,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 18:55:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:43,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:55:43,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:43,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:55:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023577308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:43,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 38 [2024-09-15 18:55:43,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702800412] [2024-09-15 18:55:43,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:43,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:43,836 INFO L87 Difference]: Start difference. First operand 499 states and 577 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:44,784 INFO L93 Difference]: Finished difference Result 583 states and 674 transitions. [2024-09-15 18:55:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:55:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-15 18:55:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:44,790 INFO L225 Difference]: With dead ends: 583 [2024-09-15 18:55:44,790 INFO L226 Difference]: Without dead ends: 577 [2024-09-15 18:55:44,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:55:44,795 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:44,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2645 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:55:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-09-15 18:55:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 513. [2024-09-15 18:55:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 450 states have (on average 1.1777777777777778) internal successors, (530), 486 states have internal predecessors, (530), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2024-09-15 18:55:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 594 transitions. [2024-09-15 18:55:45,014 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 594 transitions. Word has length 48 [2024-09-15 18:55:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:45,014 INFO L474 AbstractCegarLoop]: Abstraction has 513 states and 594 transitions. [2024-09-15 18:55:45,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:45,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 594 transitions. [2024-09-15 18:55:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:45,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:45,020 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:45,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-15 18:55:45,221 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:45,221 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:45,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 442135356, now seen corresponding path program 52 times [2024-09-15 18:55:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743831413] [2024-09-15 18:55:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:45,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:45,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:45,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:45,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:45,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743831413] [2024-09-15 18:55:45,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743831413] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:45,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529752167] [2024-09-15 18:55:45,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:45,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:45,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:45,664 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) [2024-09-15 18:55:45,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-15 18:55:45,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:45,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:55:45,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:45,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:55:46,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529752167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:46,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:46,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 38 [2024-09-15 18:55:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554202376] [2024-09-15 18:55:46,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:46,080 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1319, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:46,081 INFO L87 Difference]: Start difference. First operand 513 states and 594 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:46,736 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2024-09-15 18:55:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:55:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-15 18:55:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:46,739 INFO L225 Difference]: With dead ends: 519 [2024-09-15 18:55:46,739 INFO L226 Difference]: Without dead ends: 499 [2024-09-15 18:55:46,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:55:46,742 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:46,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1936 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-15 18:55:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-15 18:55:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-15 18:55:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2024-09-15 18:55:46,904 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 48 [2024-09-15 18:55:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:46,904 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2024-09-15 18:55:46,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:46,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2024-09-15 18:55:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:46,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:46,907 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:46,920 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-15 18:55:47,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:47,107 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:47,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2109377852, now seen corresponding path program 53 times [2024-09-15 18:55:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:47,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200747166] [2024-09-15 18:55:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:47,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:47,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:47,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200747166] [2024-09-15 18:55:47,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200747166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72342307] [2024-09-15 18:55:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:55:47,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:47,529 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) [2024-09-15 18:55:47,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-15 18:55:47,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:55:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:47,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-15 18:55:47,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:47,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:55:48,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72342307] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:48,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:48,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 38 [2024-09-15 18:55:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735034963] [2024-09-15 18:55:48,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:48,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:48,012 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:48,680 INFO L93 Difference]: Finished difference Result 505 states and 583 transitions. [2024-09-15 18:55:48,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:55:48,680 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-15 18:55:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:48,683 INFO L225 Difference]: With dead ends: 505 [2024-09-15 18:55:48,683 INFO L226 Difference]: Without dead ends: 483 [2024-09-15 18:55:48,687 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:55:48,687 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:48,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1441 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:55:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-09-15 18:55:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2024-09-15 18:55:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 426 states have (on average 1.1784037558685445) internal successors, (502), 458 states have internal predecessors, (502), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2024-09-15 18:55:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 560 transitions. [2024-09-15 18:55:48,891 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 560 transitions. Word has length 48 [2024-09-15 18:55:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:48,891 INFO L474 AbstractCegarLoop]: Abstraction has 483 states and 560 transitions. [2024-09-15 18:55:48,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:48,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 560 transitions. [2024-09-15 18:55:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:48,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:48,894 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2024-09-15 18:55:48,912 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:49,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:49,094 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:49,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1301335053, now seen corresponding path program 54 times [2024-09-15 18:55:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:49,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456140347] [2024-09-15 18:55:49,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:49,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:55:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-15 18:55:49,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456140347] [2024-09-15 18:55:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456140347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84838438] [2024-09-15 18:55:49,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:55:49,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:49,361 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) [2024-09-15 18:55:49,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-15 18:55:49,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:55:49,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:49,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:55:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 18:55:49,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 18:55:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84838438] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:50,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:50,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-15 18:55:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831633427] [2024-09-15 18:55:50,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:50,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:50,092 INFO L87 Difference]: Start difference. First operand 483 states and 560 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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) [2024-09-15 18:55:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:50,692 INFO L93 Difference]: Finished difference Result 539 states and 630 transitions. [2024-09-15 18:55:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:55:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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 48 [2024-09-15 18:55:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:50,700 INFO L225 Difference]: With dead ends: 539 [2024-09-15 18:55:50,700 INFO L226 Difference]: Without dead ends: 523 [2024-09-15 18:55:50,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:55:50,703 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:50,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 538 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:55:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-09-15 18:55:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2024-09-15 18:55:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 441 states have (on average 1.1700680272108843) internal successors, (516), 487 states have internal predecessors, (516), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-15 18:55:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 602 transitions. [2024-09-15 18:55:50,868 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 602 transitions. Word has length 48 [2024-09-15 18:55:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:50,869 INFO L474 AbstractCegarLoop]: Abstraction has 519 states and 602 transitions. [2024-09-15 18:55:50,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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) [2024-09-15 18:55:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 602 transitions. [2024-09-15 18:55:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:50,871 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:50,872 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:55:50,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-15 18:55:51,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:51,072 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:51,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 948849468, now seen corresponding path program 55 times [2024-09-15 18:55:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:51,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418853076] [2024-09-15 18:55:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:51,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418853076] [2024-09-15 18:55:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418853076] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600001600] [2024-09-15 18:55:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:55:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:51,404 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) [2024-09-15 18:55:51,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-15 18:55:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:51,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:55:51,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:51,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:55:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600001600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2024-09-15 18:55:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362651084] [2024-09-15 18:55:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:51,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:51,903 INFO L87 Difference]: Start difference. First operand 519 states and 602 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:52,400 INFO L93 Difference]: Finished difference Result 535 states and 622 transitions. [2024-09-15 18:55:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 18:55:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-15 18:55:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:52,404 INFO L225 Difference]: With dead ends: 535 [2024-09-15 18:55:52,404 INFO L226 Difference]: Without dead ends: 519 [2024-09-15 18:55:52,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:55:52,407 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:52,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 965 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-09-15 18:55:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 515. [2024-09-15 18:55:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.173913043478261) internal successors, (513), 483 states have internal predecessors, (513), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-15 18:55:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 599 transitions. [2024-09-15 18:55:52,574 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 599 transitions. Word has length 48 [2024-09-15 18:55:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:52,574 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 599 transitions. [2024-09-15 18:55:52,575 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:55:52,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 599 transitions. [2024-09-15 18:55:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 18:55:52,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:52,578 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2024-09-15 18:55:52,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-15 18:55:52,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:52,778 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:52,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:52,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2036774893, now seen corresponding path program 56 times [2024-09-15 18:55:52,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:52,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397056623] [2024-09-15 18:55:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:52,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:52,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:52,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:52,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:55:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-15 18:55:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397056623] [2024-09-15 18:55:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397056623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172394395] [2024-09-15 18:55:53,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:55:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:53,044 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) [2024-09-15 18:55:53,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-15 18:55:53,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:55:53,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:53,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:55:53,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 18:55:53,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 18:55:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172394395] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:53,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-15 18:55:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152911168] [2024-09-15 18:55:53,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:53,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:55:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:55:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:55:53,815 INFO L87 Difference]: Start difference. First operand 515 states and 599 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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) [2024-09-15 18:55:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:54,456 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2024-09-15 18:55:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:55:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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 48 [2024-09-15 18:55:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:54,460 INFO L225 Difference]: With dead ends: 527 [2024-09-15 18:55:54,460 INFO L226 Difference]: Without dead ends: 505 [2024-09-15 18:55:54,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:55:54,463 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:54,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 596 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:55:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-09-15 18:55:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2024-09-15 18:55:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 425 states have (on average 1.1741176470588235) internal successors, (499), 471 states have internal predecessors, (499), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2024-09-15 18:55:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 579 transitions. [2024-09-15 18:55:54,620 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 579 transitions. Word has length 48 [2024-09-15 18:55:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:54,620 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 579 transitions. [2024-09-15 18:55:54,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 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) [2024-09-15 18:55:54,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 579 transitions. [2024-09-15 18:55:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:55:54,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:54,625 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, 1, 1, 1, 1] [2024-09-15 18:55:54,642 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:54,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-09-15 18:55:54,826 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:54,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1607208165, now seen corresponding path program 57 times [2024-09-15 18:55:54,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:54,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833036373] [2024-09-15 18:55:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:54,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:54,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:54,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:55,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:55:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:55,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:55,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833036373] [2024-09-15 18:55:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833036373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:55,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438706682] [2024-09-15 18:55:55,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:55:55,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:55,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:55,379 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) [2024-09-15 18:55:55,381 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-15 18:55:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 18:55:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:55,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 18:55:55,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:56,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:55:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:56,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438706682] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:55:56,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:55:56,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-15 18:55:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355595040] [2024-09-15 18:55:56,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:55:56,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-15 18:55:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:55:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-15 18:55:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-15 18:55:56,989 INFO L87 Difference]: Start difference. First operand 503 states and 579 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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) [2024-09-15 18:55:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:55:58,520 INFO L93 Difference]: Finished difference Result 585 states and 678 transitions. [2024-09-15 18:55:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:55:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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 49 [2024-09-15 18:55:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:55:58,529 INFO L225 Difference]: With dead ends: 585 [2024-09-15 18:55:58,530 INFO L226 Difference]: Without dead ends: 572 [2024-09-15 18:55:58,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-15 18:55:58,535 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:55:58,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 899 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:55:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-15 18:55:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2024-09-15 18:55:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 529 states have internal predecessors, (559), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2024-09-15 18:55:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 651 transitions. [2024-09-15 18:55:58,737 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 651 transitions. Word has length 49 [2024-09-15 18:55:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:55:58,737 INFO L474 AbstractCegarLoop]: Abstraction has 564 states and 651 transitions. [2024-09-15 18:55:58,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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) [2024-09-15 18:55:58,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 651 transitions. [2024-09-15 18:55:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:55:58,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:55:58,741 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, 1, 1, 1, 1] [2024-09-15 18:55:58,753 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-09-15 18:55:58,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:58,941 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:55:58,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:55:58,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791346, now seen corresponding path program 58 times [2024-09-15 18:55:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:55:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790563849] [2024-09-15 18:55:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:55:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:55:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:58,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:55:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:58,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:55:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:59,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:55:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:55:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:59,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:55:59,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790563849] [2024-09-15 18:55:59,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790563849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:55:59,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483721119] [2024-09-15 18:55:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:55:59,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:55:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:55:59,343 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) [2024-09-15 18:55:59,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-15 18:55:59,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:55:59,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:55:59,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 18:55:59,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:55:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:55:59,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483721119] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:00,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-15 18:56:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278660246] [2024-09-15 18:56:00,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:00,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-15 18:56:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-15 18:56:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-15 18:56:00,919 INFO L87 Difference]: Start difference. First operand 564 states and 651 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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) [2024-09-15 18:56:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:02,404 INFO L93 Difference]: Finished difference Result 578 states and 665 transitions. [2024-09-15 18:56:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:56:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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 49 [2024-09-15 18:56:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:02,409 INFO L225 Difference]: With dead ends: 578 [2024-09-15 18:56:02,409 INFO L226 Difference]: Without dead ends: 567 [2024-09-15 18:56:02,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-15 18:56:02,413 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:02,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1147 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:56:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-15 18:56:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2024-09-15 18:56:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 478 states have (on average 1.1715481171548117) internal successors, (560), 530 states have internal predecessors, (560), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-15 18:56:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 648 transitions. [2024-09-15 18:56:02,653 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 648 transitions. Word has length 49 [2024-09-15 18:56:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:02,653 INFO L474 AbstractCegarLoop]: Abstraction has 565 states and 648 transitions. [2024-09-15 18:56:02,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 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) [2024-09-15 18:56:02,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 648 transitions. [2024-09-15 18:56:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:56:02,656 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:02,656 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2024-09-15 18:56:02,668 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-15 18:56:02,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-15 18:56:02,857 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:02,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:02,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1028676879, now seen corresponding path program 59 times [2024-09-15 18:56:02,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:02,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784947648] [2024-09-15 18:56:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:02,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:02,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:02,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:02,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:02,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784947648] [2024-09-15 18:56:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784947648] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219059295] [2024-09-15 18:56:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:02,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:02,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:02,955 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) [2024-09-15 18:56:02,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-15 18:56:03,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:56:03,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:03,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 18:56:03,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:03,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:03,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219059295] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:03,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:03,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-15 18:56:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342944955] [2024-09-15 18:56:03,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:03,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:56:03,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:56:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:56:03,183 INFO L87 Difference]: Start difference. First operand 565 states and 648 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:03,478 INFO L93 Difference]: Finished difference Result 592 states and 681 transitions. [2024-09-15 18:56:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:56:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 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 49 [2024-09-15 18:56:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:03,482 INFO L225 Difference]: With dead ends: 592 [2024-09-15 18:56:03,482 INFO L226 Difference]: Without dead ends: 568 [2024-09-15 18:56:03,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:56:03,486 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:03,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 232 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:56:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-15 18:56:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2024-09-15 18:56:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 477 states have (on average 1.1635220125786163) internal successors, (555), 525 states have internal predecessors, (555), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-15 18:56:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 635 transitions. [2024-09-15 18:56:03,690 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 635 transitions. Word has length 49 [2024-09-15 18:56:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:03,690 INFO L474 AbstractCegarLoop]: Abstraction has 558 states and 635 transitions. [2024-09-15 18:56:03,690 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:03,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 635 transitions. [2024-09-15 18:56:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:56:03,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:03,696 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2024-09-15 18:56:03,713 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:03,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-15 18:56:03,897 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:03,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash -853281446, now seen corresponding path program 60 times [2024-09-15 18:56:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:03,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854178421] [2024-09-15 18:56:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:03,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:03,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:04,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:56:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:04,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:04,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854178421] [2024-09-15 18:56:04,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854178421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:04,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695600481] [2024-09-15 18:56:04,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:56:04,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:04,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:04,016 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) [2024-09-15 18:56:04,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-15 18:56:04,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:56:04,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:04,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 18:56:04,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:04,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695600481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:04,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-15 18:56:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790430868] [2024-09-15 18:56:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:04,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:56:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:56:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:56:04,224 INFO L87 Difference]: Start difference. First operand 558 states and 635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:04,527 INFO L93 Difference]: Finished difference Result 861 states and 969 transitions. [2024-09-15 18:56:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 18:56:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-09-15 18:56:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:04,536 INFO L225 Difference]: With dead ends: 861 [2024-09-15 18:56:04,536 INFO L226 Difference]: Without dead ends: 567 [2024-09-15 18:56:04,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:56:04,542 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:04,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:56:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-15 18:56:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-15 18:56:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-15 18:56:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 644 transitions. [2024-09-15 18:56:04,755 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 644 transitions. Word has length 49 [2024-09-15 18:56:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:04,755 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 644 transitions. [2024-09-15 18:56:04,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:04,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 644 transitions. [2024-09-15 18:56:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:56:04,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:04,758 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, 1, 1, 1, 1] [2024-09-15 18:56:04,770 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:04,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-15 18:56:04,959 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:04,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash 794575845, now seen corresponding path program 61 times [2024-09-15 18:56:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487702900] [2024-09-15 18:56:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:05,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:05,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:05,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487702900] [2024-09-15 18:56:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487702900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449361413] [2024-09-15 18:56:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:56:05,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:05,500 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) [2024-09-15 18:56:05,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-15 18:56:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:05,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:56:05,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:05,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:05,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449361413] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:05,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:05,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 40 [2024-09-15 18:56:05,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350748491] [2024-09-15 18:56:05,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:05,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:56:05,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:05,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:56:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:56:05,894 INFO L87 Difference]: Start difference. First operand 567 states and 644 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:06,857 INFO L93 Difference]: Finished difference Result 657 states and 747 transitions. [2024-09-15 18:56:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:56:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-15 18:56:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:06,863 INFO L225 Difference]: With dead ends: 657 [2024-09-15 18:56:06,864 INFO L226 Difference]: Without dead ends: 651 [2024-09-15 18:56:06,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=1957, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:56:06,869 INFO L434 NwaCegarLoop]: 91 mSDtfsCounter, 97 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:06,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 3026 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:56:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-09-15 18:56:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 581. [2024-09-15 18:56:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 497 states have (on average 1.1609657947686116) internal successors, (577), 547 states have internal predecessors, (577), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2024-09-15 18:56:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 661 transitions. [2024-09-15 18:56:07,205 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 661 transitions. Word has length 50 [2024-09-15 18:56:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:07,205 INFO L474 AbstractCegarLoop]: Abstraction has 581 states and 661 transitions. [2024-09-15 18:56:07,205 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 661 transitions. [2024-09-15 18:56:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:56:07,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:07,212 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:07,229 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-09-15 18:56:07,413 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:07,414 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:07,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1446674175, now seen corresponding path program 62 times [2024-09-15 18:56:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:07,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960059449] [2024-09-15 18:56:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:07,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:07,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:07,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960059449] [2024-09-15 18:56:08,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960059449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:08,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587193847] [2024-09-15 18:56:08,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:56:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:08,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:08,105 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) [2024-09-15 18:56:08,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-15 18:56:08,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:56:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:08,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:56:08,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:08,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587193847] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:08,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 40 [2024-09-15 18:56:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283684100] [2024-09-15 18:56:08,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:08,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:56:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:56:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:56:08,555 INFO L87 Difference]: Start difference. First operand 581 states and 661 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:09,403 INFO L93 Difference]: Finished difference Result 587 states and 666 transitions. [2024-09-15 18:56:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:56:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-15 18:56:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:09,407 INFO L225 Difference]: With dead ends: 587 [2024-09-15 18:56:09,407 INFO L226 Difference]: Without dead ends: 567 [2024-09-15 18:56:09,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:56:09,411 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:09,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2521 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:56:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-15 18:56:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-15 18:56:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2024-09-15 18:56:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 645 transitions. [2024-09-15 18:56:09,648 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 645 transitions. Word has length 50 [2024-09-15 18:56:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:09,648 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 645 transitions. [2024-09-15 18:56:09,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:09,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 645 transitions. [2024-09-15 18:56:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:56:09,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:09,651 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:09,663 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:09,852 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:09,852 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:09,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:09,852 INFO L85 PathProgramCache]: Analyzing trace with hash -10438683, now seen corresponding path program 63 times [2024-09-15 18:56:09,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:09,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97518410] [2024-09-15 18:56:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:09,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:09,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:10,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:10,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:10,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97518410] [2024-09-15 18:56:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97518410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:10,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978981740] [2024-09-15 18:56:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:56:10,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:10,273 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) [2024-09-15 18:56:10,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-15 18:56:10,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:56:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:10,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:56:10,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:10,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:10,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978981740] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:10,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:10,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 40 [2024-09-15 18:56:10,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899837886] [2024-09-15 18:56:10,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:10,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:56:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:56:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:56:10,755 INFO L87 Difference]: Start difference. First operand 567 states and 645 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:11,443 INFO L93 Difference]: Finished difference Result 573 states and 650 transitions. [2024-09-15 18:56:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:56:11,443 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-15 18:56:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:11,447 INFO L225 Difference]: With dead ends: 573 [2024-09-15 18:56:11,447 INFO L226 Difference]: Without dead ends: 551 [2024-09-15 18:56:11,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:56:11,454 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:11,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1933 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:56:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-09-15 18:56:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2024-09-15 18:56:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 473 states have (on average 1.160676532769556) internal successors, (549), 519 states have internal predecessors, (549), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2024-09-15 18:56:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 627 transitions. [2024-09-15 18:56:11,686 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 627 transitions. Word has length 50 [2024-09-15 18:56:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:11,686 INFO L474 AbstractCegarLoop]: Abstraction has 551 states and 627 transitions. [2024-09-15 18:56:11,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:11,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 627 transitions. [2024-09-15 18:56:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:56:11,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:11,689 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:11,701 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-15 18:56:11,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-09-15 18:56:11,890 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:11,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1691124479, now seen corresponding path program 64 times [2024-09-15 18:56:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:11,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143178628] [2024-09-15 18:56:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:11,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:12,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:12,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:12,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143178628] [2024-09-15 18:56:12,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143178628] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:12,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070850143] [2024-09-15 18:56:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:56:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:12,290 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) [2024-09-15 18:56:12,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-15 18:56:12,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:56:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:12,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 18:56:12,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:12,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070850143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:12,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:12,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 40 [2024-09-15 18:56:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907479202] [2024-09-15 18:56:12,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:12,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:56:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:56:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:56:12,801 INFO L87 Difference]: Start difference. First operand 551 states and 627 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:13,374 INFO L93 Difference]: Finished difference Result 557 states and 632 transitions. [2024-09-15 18:56:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:56:13,375 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-15 18:56:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:13,377 INFO L225 Difference]: With dead ends: 557 [2024-09-15 18:56:13,378 INFO L226 Difference]: Without dead ends: 533 [2024-09-15 18:56:13,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:56:13,380 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:13,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1387 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:56:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-15 18:56:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2024-09-15 18:56:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 458 states have (on average 1.1615720524017468) internal successors, (532), 502 states have internal predecessors, (532), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2024-09-15 18:56:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 607 transitions. [2024-09-15 18:56:13,562 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 607 transitions. Word has length 50 [2024-09-15 18:56:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:13,562 INFO L474 AbstractCegarLoop]: Abstraction has 533 states and 607 transitions. [2024-09-15 18:56:13,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:13,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 607 transitions. [2024-09-15 18:56:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:56:13,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:13,565 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2024-09-15 18:56:13,577 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:13,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:13,766 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash -695186459, now seen corresponding path program 65 times [2024-09-15 18:56:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357954360] [2024-09-15 18:56:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:13,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:13,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:14,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357954360] [2024-09-15 18:56:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357954360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185032973] [2024-09-15 18:56:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:14,160 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) [2024-09-15 18:56:14,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-15 18:56:14,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:56:14,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:14,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-15 18:56:14,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:14,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:14,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185032973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:14,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:14,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-09-15 18:56:14,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230197777] [2024-09-15 18:56:14,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:14,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:56:14,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:56:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:56:14,710 INFO L87 Difference]: Start difference. First operand 533 states and 607 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:15,205 INFO L93 Difference]: Finished difference Result 549 states and 626 transitions. [2024-09-15 18:56:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 18:56:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-15 18:56:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:15,210 INFO L225 Difference]: With dead ends: 549 [2024-09-15 18:56:15,210 INFO L226 Difference]: Without dead ends: 543 [2024-09-15 18:56:15,212 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:56:15,212 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:15,213 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 836 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:56:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-09-15 18:56:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2024-09-15 18:56:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 463 states have (on average 1.16414686825054) internal successors, (539), 509 states have internal predecessors, (539), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2024-09-15 18:56:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 618 transitions. [2024-09-15 18:56:15,400 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 618 transitions. Word has length 50 [2024-09-15 18:56:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:15,400 INFO L474 AbstractCegarLoop]: Abstraction has 541 states and 618 transitions. [2024-09-15 18:56:15,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 618 transitions. [2024-09-15 18:56:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:56:15,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:15,403 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, 1, 1, 1, 1] [2024-09-15 18:56:15,416 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:15,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:15,604 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:15,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -85333614, now seen corresponding path program 66 times [2024-09-15 18:56:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657383347] [2024-09-15 18:56:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:15,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:15,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:15,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657383347] [2024-09-15 18:56:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657383347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884559660] [2024-09-15 18:56:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:56:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:16,112 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) [2024-09-15 18:56:16,113 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-15 18:56:16,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-15 18:56:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:16,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:56:16,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:16,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884559660] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:17,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:17,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-15 18:56:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043926304] [2024-09-15 18:56:17,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:17,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-15 18:56:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-15 18:56:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-15 18:56:17,910 INFO L87 Difference]: Start difference. First operand 541 states and 618 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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) [2024-09-15 18:56:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:19,576 INFO L93 Difference]: Finished difference Result 625 states and 719 transitions. [2024-09-15 18:56:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 18:56:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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 51 [2024-09-15 18:56:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:19,583 INFO L225 Difference]: With dead ends: 625 [2024-09-15 18:56:19,583 INFO L226 Difference]: Without dead ends: 612 [2024-09-15 18:56:19,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-15 18:56:19,588 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:19,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 914 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:56:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-09-15 18:56:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2024-09-15 18:56:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 517 states have (on average 1.1624758220502902) internal successors, (601), 569 states have internal predecessors, (601), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2024-09-15 18:56:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 692 transitions. [2024-09-15 18:56:19,849 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 692 transitions. Word has length 51 [2024-09-15 18:56:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:19,850 INFO L474 AbstractCegarLoop]: Abstraction has 604 states and 692 transitions. [2024-09-15 18:56:19,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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) [2024-09-15 18:56:19,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 692 transitions. [2024-09-15 18:56:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:56:19,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:19,856 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, 1, 1, 1, 1] [2024-09-15 18:56:19,874 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-15 18:56:20,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-09-15 18:56:20,057 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:20,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2059531173, now seen corresponding path program 67 times [2024-09-15 18:56:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:20,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732939385] [2024-09-15 18:56:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:20,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:20,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:20,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732939385] [2024-09-15 18:56:20,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732939385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730541654] [2024-09-15 18:56:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:56:20,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:20,678 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) [2024-09-15 18:56:20,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-15 18:56:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:20,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:56:20,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:21,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730541654] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:22,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-15 18:56:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069717806] [2024-09-15 18:56:22,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:22,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-15 18:56:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-15 18:56:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-15 18:56:22,449 INFO L87 Difference]: Start difference. First operand 604 states and 692 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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) [2024-09-15 18:56:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:24,128 INFO L93 Difference]: Finished difference Result 618 states and 706 transitions. [2024-09-15 18:56:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 18:56:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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 51 [2024-09-15 18:56:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:24,131 INFO L225 Difference]: With dead ends: 618 [2024-09-15 18:56:24,132 INFO L226 Difference]: Without dead ends: 607 [2024-09-15 18:56:24,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-15 18:56:24,136 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:24,136 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1042 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:56:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-09-15 18:56:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2024-09-15 18:56:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 518 states have (on average 1.162162162162162) internal successors, (602), 570 states have internal predecessors, (602), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-15 18:56:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 689 transitions. [2024-09-15 18:56:24,470 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 689 transitions. Word has length 51 [2024-09-15 18:56:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:24,470 INFO L474 AbstractCegarLoop]: Abstraction has 605 states and 689 transitions. [2024-09-15 18:56:24,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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) [2024-09-15 18:56:24,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 689 transitions. [2024-09-15 18:56:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:56:24,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:24,476 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1] [2024-09-15 18:56:24,494 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:24,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-15 18:56:24,677 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -89209158, now seen corresponding path program 68 times [2024-09-15 18:56:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572149047] [2024-09-15 18:56:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:24,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:24,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:24,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572149047] [2024-09-15 18:56:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572149047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102901171] [2024-09-15 18:56:24,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:56:24,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:24,790 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) [2024-09-15 18:56:24,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-15 18:56:24,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:56:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:24,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:56:24,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:24,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:25,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102901171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:25,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:25,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-15 18:56:25,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611053674] [2024-09-15 18:56:25,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:25,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:56:25,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:56:25,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:56:25,027 INFO L87 Difference]: Start difference. First operand 605 states and 689 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:25,467 INFO L93 Difference]: Finished difference Result 1012 states and 1152 transitions. [2024-09-15 18:56:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:56:25,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-09-15 18:56:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:25,478 INFO L225 Difference]: With dead ends: 1012 [2024-09-15 18:56:25,478 INFO L226 Difference]: Without dead ends: 687 [2024-09-15 18:56:25,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:56:25,483 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:25,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 236 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:56:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-09-15 18:56:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2024-09-15 18:56:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 600 states have (on average 1.1583333333333334) internal successors, (695), 652 states have internal predecessors, (695), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-15 18:56:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 782 transitions. [2024-09-15 18:56:25,738 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 782 transitions. Word has length 51 [2024-09-15 18:56:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:25,738 INFO L474 AbstractCegarLoop]: Abstraction has 687 states and 782 transitions. [2024-09-15 18:56:25,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:25,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 782 transitions. [2024-09-15 18:56:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:56:25,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:25,742 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1] [2024-09-15 18:56:25,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-15 18:56:25,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-15 18:56:25,943 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:25,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1053081969, now seen corresponding path program 69 times [2024-09-15 18:56:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:25,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973370446] [2024-09-15 18:56:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:25,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:25,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:25,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:26,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973370446] [2024-09-15 18:56:26,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973370446] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706905728] [2024-09-15 18:56:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:56:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:26,092 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) [2024-09-15 18:56:26,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-15 18:56:26,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:56:26,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:26,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:56:26,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:26,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:56:26,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706905728] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:26,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:26,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-15 18:56:26,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142041725] [2024-09-15 18:56:26,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:26,386 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:56:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:56:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:56:26,386 INFO L87 Difference]: Start difference. First operand 687 states and 782 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:26,857 INFO L93 Difference]: Finished difference Result 805 states and 931 transitions. [2024-09-15 18:56:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:56:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 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 51 [2024-09-15 18:56:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:26,861 INFO L225 Difference]: With dead ends: 805 [2024-09-15 18:56:26,861 INFO L226 Difference]: Without dead ends: 769 [2024-09-15 18:56:26,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:56:26,866 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:26,866 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 261 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:56:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-15 18:56:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-15 18:56:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-15 18:56:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 875 transitions. [2024-09-15 18:56:27,152 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 875 transitions. Word has length 51 [2024-09-15 18:56:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:27,152 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 875 transitions. [2024-09-15 18:56:27,152 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:27,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 875 transitions. [2024-09-15 18:56:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:27,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:27,157 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, 1, 1, 1, 1] [2024-09-15 18:56:27,169 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:27,357 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-09-15 18:56:27,357 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:27,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1631662044, now seen corresponding path program 70 times [2024-09-15 18:56:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:27,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050431689] [2024-09-15 18:56:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:27,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:27,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:27,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050431689] [2024-09-15 18:56:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050431689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181441174] [2024-09-15 18:56:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:56:27,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:27,907 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) [2024-09-15 18:56:27,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-15 18:56:27,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:56:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:28,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 18:56:28,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:28,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181441174] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:28,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:28,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 42 [2024-09-15 18:56:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031005073] [2024-09-15 18:56:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:28,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:56:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:56:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:56:28,334 INFO L87 Difference]: Start difference. First operand 769 states and 875 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:29,474 INFO L93 Difference]: Finished difference Result 875 states and 996 transitions. [2024-09-15 18:56:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-15 18:56:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-15 18:56:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:29,481 INFO L225 Difference]: With dead ends: 875 [2024-09-15 18:56:29,481 INFO L226 Difference]: Without dead ends: 869 [2024-09-15 18:56:29,486 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:29,486 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 108 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:29,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 3459 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:56:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2024-09-15 18:56:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 783. [2024-09-15 18:56:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 693 states have (on average 1.155844155844156) internal successors, (801), 747 states have internal predecessors, (801), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2024-09-15 18:56:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 892 transitions. [2024-09-15 18:56:29,811 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 892 transitions. Word has length 52 [2024-09-15 18:56:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:29,812 INFO L474 AbstractCegarLoop]: Abstraction has 783 states and 892 transitions. [2024-09-15 18:56:29,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:29,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 892 transitions. [2024-09-15 18:56:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:29,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:29,817 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:29,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-09-15 18:56:30,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:30,017 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:30,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash 722880988, now seen corresponding path program 71 times [2024-09-15 18:56:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909683539] [2024-09-15 18:56:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:30,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:30,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:30,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909683539] [2024-09-15 18:56:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909683539] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193904016] [2024-09-15 18:56:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:30,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:30,527 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) [2024-09-15 18:56:30,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-15 18:56:30,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:56:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:30,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-15 18:56:30,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:30,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:56:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193904016] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:30,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:30,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2024-09-15 18:56:30,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97924279] [2024-09-15 18:56:30,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:30,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:56:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:56:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:56:30,948 INFO L87 Difference]: Start difference. First operand 783 states and 892 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:31,991 INFO L93 Difference]: Finished difference Result 789 states and 897 transitions. [2024-09-15 18:56:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:56:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-15 18:56:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:31,995 INFO L225 Difference]: With dead ends: 789 [2024-09-15 18:56:31,995 INFO L226 Difference]: Without dead ends: 769 [2024-09-15 18:56:32,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:32,001 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:32,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2954 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:56:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-15 18:56:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-15 18:56:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-15 18:56:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 876 transitions. [2024-09-15 18:56:32,317 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 876 transitions. Word has length 52 [2024-09-15 18:56:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:32,317 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 876 transitions. [2024-09-15 18:56:32,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:32,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 876 transitions. [2024-09-15 18:56:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:32,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:32,322 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:32,334 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-09-15 18:56:32,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:32,522 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:32,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:32,522 INFO L85 PathProgramCache]: Analyzing trace with hash 996657116, now seen corresponding path program 72 times [2024-09-15 18:56:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:32,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878238299] [2024-09-15 18:56:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:32,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:32,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:32,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:32,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:32,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:32,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878238299] [2024-09-15 18:56:32,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878238299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:32,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927787241] [2024-09-15 18:56:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:56:32,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:32,976 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) [2024-09-15 18:56:32,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-15 18:56:33,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:56:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:33,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:56:33,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:33,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:56:33,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927787241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:33,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:33,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 42 [2024-09-15 18:56:33,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239974473] [2024-09-15 18:56:33,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:33,480 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:56:33,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:56:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1623, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:56:33,480 INFO L87 Difference]: Start difference. First operand 769 states and 876 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:34,350 INFO L93 Difference]: Finished difference Result 775 states and 881 transitions. [2024-09-15 18:56:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:56:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-15 18:56:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:34,355 INFO L225 Difference]: With dead ends: 775 [2024-09-15 18:56:34,355 INFO L226 Difference]: Without dead ends: 753 [2024-09-15 18:56:34,359 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:34,359 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:34,359 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2189 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:56:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-09-15 18:56:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2024-09-15 18:56:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 669 states have (on average 1.155455904334828) internal successors, (773), 719 states have internal predecessors, (773), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2024-09-15 18:56:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 858 transitions. [2024-09-15 18:56:34,638 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 858 transitions. Word has length 52 [2024-09-15 18:56:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:34,638 INFO L474 AbstractCegarLoop]: Abstraction has 753 states and 858 transitions. [2024-09-15 18:56:34,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:34,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 858 transitions. [2024-09-15 18:56:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:34,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:34,643 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:56:34,655 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:34,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:34,843 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1811395036, now seen corresponding path program 73 times [2024-09-15 18:56:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:34,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987363414] [2024-09-15 18:56:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:34,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:34,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:34,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:35,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:35,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987363414] [2024-09-15 18:56:35,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987363414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:35,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540467528] [2024-09-15 18:56:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:56:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:35,262 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) [2024-09-15 18:56:35,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-15 18:56:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:35,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:56:35,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:35,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:56:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540467528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:35,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 42 [2024-09-15 18:56:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160944635] [2024-09-15 18:56:35,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:35,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:56:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:56:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:56:35,793 INFO L87 Difference]: Start difference. First operand 753 states and 858 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:36,557 INFO L93 Difference]: Finished difference Result 759 states and 863 transitions. [2024-09-15 18:56:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:56:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-15 18:56:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:36,562 INFO L225 Difference]: With dead ends: 759 [2024-09-15 18:56:36,562 INFO L226 Difference]: Without dead ends: 735 [2024-09-15 18:56:36,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:36,566 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:36,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1521 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:56:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-15 18:56:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2024-09-15 18:56:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 654 states have (on average 1.1559633027522935) internal successors, (756), 702 states have internal predecessors, (756), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2024-09-15 18:56:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 838 transitions. [2024-09-15 18:56:36,851 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 838 transitions. Word has length 52 [2024-09-15 18:56:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:36,851 INFO L474 AbstractCegarLoop]: Abstraction has 735 states and 838 transitions. [2024-09-15 18:56:36,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:36,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 838 transitions. [2024-09-15 18:56:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:36,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:36,856 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2024-09-15 18:56:36,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-09-15 18:56:37,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:37,057 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:37,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1405283885, now seen corresponding path program 74 times [2024-09-15 18:56:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621298391] [2024-09-15 18:56:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:37,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:37,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:37,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:56:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:56:37,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:37,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621298391] [2024-09-15 18:56:37,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621298391] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:37,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109754697] [2024-09-15 18:56:37,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:56:37,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:37,422 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) [2024-09-15 18:56:37,423 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-15 18:56:37,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:56:37,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:37,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:56:37,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-15 18:56:37,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-15 18:56:38,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109754697] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:38,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:38,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-15 18:56:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32260258] [2024-09-15 18:56:38,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:38,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:56:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:56:38,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:56:38,322 INFO L87 Difference]: Start difference. First operand 735 states and 838 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2024-09-15 18:56:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:39,169 INFO L93 Difference]: Finished difference Result 803 states and 924 transitions. [2024-09-15 18:56:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:56:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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 52 [2024-09-15 18:56:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:39,187 INFO L225 Difference]: With dead ends: 803 [2024-09-15 18:56:39,187 INFO L226 Difference]: Without dead ends: 786 [2024-09-15 18:56:39,193 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:56:39,193 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:39,193 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 634 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:56:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-09-15 18:56:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 782. [2024-09-15 18:56:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 674 states have (on average 1.1498516320474776) internal successors, (775), 740 states have internal predecessors, (775), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-15 18:56:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 893 transitions. [2024-09-15 18:56:39,580 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 893 transitions. Word has length 52 [2024-09-15 18:56:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:39,580 INFO L474 AbstractCegarLoop]: Abstraction has 782 states and 893 transitions. [2024-09-15 18:56:39,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2024-09-15 18:56:39,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 893 transitions. [2024-09-15 18:56:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:39,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:39,586 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2024-09-15 18:56:39,598 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:39,786 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:39,786 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:39,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 635330524, now seen corresponding path program 75 times [2024-09-15 18:56:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88935045] [2024-09-15 18:56:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:39,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:39,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:39,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:39,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88935045] [2024-09-15 18:56:40,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88935045] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928418402] [2024-09-15 18:56:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:56:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:40,169 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) [2024-09-15 18:56:40,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-15 18:56:40,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:56:40,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:40,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 18:56:40,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:40,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:56:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928418402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:40,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2024-09-15 18:56:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671962406] [2024-09-15 18:56:40,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:40,744 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:56:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:56:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:56:40,745 INFO L87 Difference]: Start difference. First operand 782 states and 893 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:41,506 INFO L93 Difference]: Finished difference Result 798 states and 913 transitions. [2024-09-15 18:56:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:56:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-15 18:56:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:41,515 INFO L225 Difference]: With dead ends: 798 [2024-09-15 18:56:41,515 INFO L226 Difference]: Without dead ends: 781 [2024-09-15 18:56:41,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:56:41,524 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:41,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1129 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:56:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2024-09-15 18:56:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 777. [2024-09-15 18:56:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 669 states have (on average 1.1524663677130045) internal successors, (771), 735 states have internal predecessors, (771), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-15 18:56:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 889 transitions. [2024-09-15 18:56:41,929 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 889 transitions. Word has length 52 [2024-09-15 18:56:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:41,929 INFO L474 AbstractCegarLoop]: Abstraction has 777 states and 889 transitions. [2024-09-15 18:56:41,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:41,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 889 transitions. [2024-09-15 18:56:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 18:56:41,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:41,935 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2024-09-15 18:56:41,947 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-15 18:56:42,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:42,136 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:42,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -882558989, now seen corresponding path program 76 times [2024-09-15 18:56:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346883461] [2024-09-15 18:56:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:42,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:42,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:42,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:56:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 18:56:42,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:42,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346883461] [2024-09-15 18:56:42,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346883461] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442237150] [2024-09-15 18:56:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:56:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:42,491 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) [2024-09-15 18:56:42,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-15 18:56:42,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:56:42,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:42,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:56:42,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-15 18:56:42,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-15 18:56:43,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442237150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:43,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:43,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-15 18:56:43,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828672298] [2024-09-15 18:56:43,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:43,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:56:43,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:56:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:56:43,380 INFO L87 Difference]: Start difference. First operand 777 states and 889 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2024-09-15 18:56:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:44,264 INFO L93 Difference]: Finished difference Result 789 states and 900 transitions. [2024-09-15 18:56:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:56:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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 52 [2024-09-15 18:56:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:44,268 INFO L225 Difference]: With dead ends: 789 [2024-09-15 18:56:44,269 INFO L226 Difference]: Without dead ends: 765 [2024-09-15 18:56:44,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:56:44,275 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:44,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 626 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:56:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2024-09-15 18:56:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 763. [2024-09-15 18:56:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 655 states have (on average 1.1526717557251909) internal successors, (755), 721 states have internal predecessors, (755), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2024-09-15 18:56:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 865 transitions. [2024-09-15 18:56:44,628 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 865 transitions. Word has length 52 [2024-09-15 18:56:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:44,628 INFO L474 AbstractCegarLoop]: Abstraction has 763 states and 865 transitions. [2024-09-15 18:56:44,628 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 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) [2024-09-15 18:56:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 865 transitions. [2024-09-15 18:56:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:56:44,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:44,636 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, 1, 1, 1, 1] [2024-09-15 18:56:44,652 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-15 18:56:44,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-09-15 18:56:44,837 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:44,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash 94534779, now seen corresponding path program 77 times [2024-09-15 18:56:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:44,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857775605] [2024-09-15 18:56:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:44,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:44,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:44,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:45,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857775605] [2024-09-15 18:56:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857775605] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956708158] [2024-09-15 18:56:45,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:56:45,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:45,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:45,363 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:56:45,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-15 18:56:45,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-15 18:56:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:45,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:56:45,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:46,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956708158] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:47,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-15 18:56:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359124785] [2024-09-15 18:56:47,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:47,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-15 18:56:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-15 18:56:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-15 18:56:47,427 INFO L87 Difference]: Start difference. First operand 763 states and 865 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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) [2024-09-15 18:56:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:49,496 INFO L93 Difference]: Finished difference Result 869 states and 992 transitions. [2024-09-15 18:56:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:56:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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 53 [2024-09-15 18:56:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:49,513 INFO L225 Difference]: With dead ends: 869 [2024-09-15 18:56:49,516 INFO L226 Difference]: Without dead ends: 856 [2024-09-15 18:56:49,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-15 18:56:49,527 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:49,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 985 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:56:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-09-15 18:56:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 848. [2024-09-15 18:56:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 728 states have (on average 1.151098901098901) internal successors, (838), 802 states have internal predecessors, (838), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2024-09-15 18:56:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 964 transitions. [2024-09-15 18:56:49,925 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 964 transitions. Word has length 53 [2024-09-15 18:56:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:49,925 INFO L474 AbstractCegarLoop]: Abstraction has 848 states and 964 transitions. [2024-09-15 18:56:49,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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) [2024-09-15 18:56:49,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 964 transitions. [2024-09-15 18:56:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:56:49,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:49,931 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, 1, 1, 1, 1] [2024-09-15 18:56:49,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:50,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:50,132 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:50,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash -976047406, now seen corresponding path program 78 times [2024-09-15 18:56:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994519320] [2024-09-15 18:56:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:50,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:50,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:50,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:56:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:50,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994519320] [2024-09-15 18:56:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994519320] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538528735] [2024-09-15 18:56:50,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:56:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:50,659 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:56:50,660 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-15 18:56:50,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-15 18:56:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:50,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:56:50,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:51,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:56:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538528735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:52,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-15 18:56:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499734686] [2024-09-15 18:56:52,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:52,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-15 18:56:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-15 18:56:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-15 18:56:52,728 INFO L87 Difference]: Start difference. First operand 848 states and 964 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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) [2024-09-15 18:56:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:55,189 INFO L93 Difference]: Finished difference Result 862 states and 978 transitions. [2024-09-15 18:56:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:56:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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 53 [2024-09-15 18:56:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:55,195 INFO L225 Difference]: With dead ends: 862 [2024-09-15 18:56:55,195 INFO L226 Difference]: Without dead ends: 851 [2024-09-15 18:56:55,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-15 18:56:55,203 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:55,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1380 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 18:56:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-09-15 18:56:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 849. [2024-09-15 18:56:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 729 states have (on average 1.1508916323731138) internal successors, (839), 803 states have internal predecessors, (839), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-15 18:56:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 960 transitions. [2024-09-15 18:56:55,555 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 960 transitions. Word has length 53 [2024-09-15 18:56:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:55,555 INFO L474 AbstractCegarLoop]: Abstraction has 849 states and 960 transitions. [2024-09-15 18:56:55,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 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) [2024-09-15 18:56:55,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 960 transitions. [2024-09-15 18:56:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:56:55,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:55,562 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2024-09-15 18:56:55,574 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:55,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:55,763 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:55,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 205782261, now seen corresponding path program 79 times [2024-09-15 18:56:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:55,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129421879] [2024-09-15 18:56:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:55,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:55,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:55,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:56:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:55,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:55,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129421879] [2024-09-15 18:56:55,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129421879] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:55,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698319192] [2024-09-15 18:56:55,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:56:55,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:55,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:55,889 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:56:55,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-15 18:56:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:55,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:56:55,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:56,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698319192] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:56,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-15 18:56:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713540281] [2024-09-15 18:56:56,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:56,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:56:56,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:56:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:56:56,144 INFO L87 Difference]: Start difference. First operand 849 states and 960 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:56,693 INFO L93 Difference]: Finished difference Result 882 states and 1001 transitions. [2024-09-15 18:56:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:56:56,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 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 53 [2024-09-15 18:56:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:56,698 INFO L225 Difference]: With dead ends: 882 [2024-09-15 18:56:56,699 INFO L226 Difference]: Without dead ends: 854 [2024-09-15 18:56:56,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:56:56,706 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:56,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:56:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2024-09-15 18:56:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 844. [2024-09-15 18:56:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 730 states have (on average 1.1452054794520548) internal successors, (836), 800 states have internal predecessors, (836), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-15 18:56:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 949 transitions. [2024-09-15 18:56:57,112 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 949 transitions. Word has length 53 [2024-09-15 18:56:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:57,112 INFO L474 AbstractCegarLoop]: Abstraction has 844 states and 949 transitions. [2024-09-15 18:56:57,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:56:57,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 949 transitions. [2024-09-15 18:56:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-15 18:56:57,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:57,118 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2024-09-15 18:56:57,130 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-09-15 18:56:57,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:57,319 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:57,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -229324870, now seen corresponding path program 80 times [2024-09-15 18:56:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041982327] [2024-09-15 18:56:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:57,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:57,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:57,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:56:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041982327] [2024-09-15 18:56:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041982327] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065081740] [2024-09-15 18:56:57,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:56:57,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:57,445 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:56:57,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-15 18:56:57,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:56:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:57,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:56:57,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:57,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:56:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065081740] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:57,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-15 18:56:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428230449] [2024-09-15 18:56:57,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:57,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:56:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:56:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:56:57,700 INFO L87 Difference]: Start difference. First operand 844 states and 949 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:56:58,254 INFO L93 Difference]: Finished difference Result 1290 states and 1433 transitions. [2024-09-15 18:56:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:56:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-09-15 18:56:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:56:58,270 INFO L225 Difference]: With dead ends: 1290 [2024-09-15 18:56:58,270 INFO L226 Difference]: Without dead ends: 855 [2024-09-15 18:56:58,278 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:56:58,279 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:56:58,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 204 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:56:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-15 18:56:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-15 18:56:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-15 18:56:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 960 transitions. [2024-09-15 18:56:58,669 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 960 transitions. Word has length 53 [2024-09-15 18:56:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:56:58,669 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 960 transitions. [2024-09-15 18:56:58,669 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:56:58,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 960 transitions. [2024-09-15 18:56:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:56:58,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:56:58,678 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, 1, 1, 1, 1] [2024-09-15 18:56:58,695 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-09-15 18:56:58,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:58,879 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:56:58,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:56:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash 859920453, now seen corresponding path program 81 times [2024-09-15 18:56:58,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:56:58,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047636141] [2024-09-15 18:56:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:56:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:56:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:58,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:56:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:58,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:56:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:59,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:56:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:56:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:59,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:56:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047636141] [2024-09-15 18:56:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047636141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:56:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846277460] [2024-09-15 18:56:59,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:56:59,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:56:59,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:56:59,477 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:56:59,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-15 18:56:59,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-15 18:56:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:56:59,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 18:56:59,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:56:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:59,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:56:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:56:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846277460] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:56:59,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:56:59,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 44 [2024-09-15 18:56:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977997654] [2024-09-15 18:56:59,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:56:59,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:56:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:56:59,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:56:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:56:59,923 INFO L87 Difference]: Start difference. First operand 855 states and 960 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:01,301 INFO L93 Difference]: Finished difference Result 967 states and 1087 transitions. [2024-09-15 18:57:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:57:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:01,309 INFO L225 Difference]: With dead ends: 967 [2024-09-15 18:57:01,309 INFO L226 Difference]: Without dead ends: 961 [2024-09-15 18:57:01,318 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:01,318 INFO L434 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:01,318 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3984 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:57:01,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-09-15 18:57:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 869. [2024-09-15 18:57:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 752 states have (on average 1.1436170212765957) internal successors, (860), 824 states have internal predecessors, (860), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2024-09-15 18:57:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 977 transitions. [2024-09-15 18:57:01,684 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 977 transitions. Word has length 54 [2024-09-15 18:57:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:01,684 INFO L474 AbstractCegarLoop]: Abstraction has 869 states and 977 transitions. [2024-09-15 18:57:01,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:01,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 977 transitions. [2024-09-15 18:57:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:01,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:01,690 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:01,702 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:01,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:01,891 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:01,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:01,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1993786783, now seen corresponding path program 82 times [2024-09-15 18:57:01,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:01,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555371096] [2024-09-15 18:57:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:01,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:02,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:02,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:02,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555371096] [2024-09-15 18:57:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555371096] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480411234] [2024-09-15 18:57:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:57:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:02,489 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:02,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-15 18:57:02,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:57:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:02,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 18:57:02,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:02,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480411234] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:02,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 44 [2024-09-15 18:57:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64763977] [2024-09-15 18:57:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:02,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:57:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:57:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:57:03,000 INFO L87 Difference]: Start difference. First operand 869 states and 977 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:04,183 INFO L93 Difference]: Finished difference Result 875 states and 982 transitions. [2024-09-15 18:57:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-15 18:57:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:04,189 INFO L225 Difference]: With dead ends: 875 [2024-09-15 18:57:04,189 INFO L226 Difference]: Without dead ends: 855 [2024-09-15 18:57:04,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2325, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:04,200 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 96 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:04,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3320 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:57:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-15 18:57:04,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-15 18:57:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2024-09-15 18:57:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 961 transitions. [2024-09-15 18:57:04,573 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 961 transitions. Word has length 54 [2024-09-15 18:57:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:04,573 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 961 transitions. [2024-09-15 18:57:04,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:04,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 961 transitions. [2024-09-15 18:57:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:04,579 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:04,579 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:04,591 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:04,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:04,780 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:04,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1858550853, now seen corresponding path program 83 times [2024-09-15 18:57:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:04,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791870125] [2024-09-15 18:57:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:04,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:04,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:04,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:05,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:05,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:05,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791870125] [2024-09-15 18:57:05,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791870125] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:05,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175761386] [2024-09-15 18:57:05,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:57:05,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:05,345 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:05,346 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-15 18:57:05,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:57:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:05,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:57:05,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:05,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175761386] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:05,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 44 [2024-09-15 18:57:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607614911] [2024-09-15 18:57:05,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:05,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:57:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:57:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:57:05,884 INFO L87 Difference]: Start difference. First operand 855 states and 961 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:06,907 INFO L93 Difference]: Finished difference Result 861 states and 966 transitions. [2024-09-15 18:57:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:57:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:06,913 INFO L225 Difference]: With dead ends: 861 [2024-09-15 18:57:06,913 INFO L226 Difference]: Without dead ends: 839 [2024-09-15 18:57:06,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=2321, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:06,920 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:06,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2581 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:57:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-09-15 18:57:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2024-09-15 18:57:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 728 states have (on average 1.1428571428571428) internal successors, (832), 796 states have internal predecessors, (832), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2024-09-15 18:57:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 943 transitions. [2024-09-15 18:57:07,324 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 943 transitions. Word has length 54 [2024-09-15 18:57:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:07,324 INFO L474 AbstractCegarLoop]: Abstraction has 839 states and 943 transitions. [2024-09-15 18:57:07,324 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:07,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 943 transitions. [2024-09-15 18:57:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:07,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:07,330 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:07,342 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-09-15 18:57:07,530 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:07,531 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:07,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -295057823, now seen corresponding path program 84 times [2024-09-15 18:57:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:07,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34132022] [2024-09-15 18:57:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:07,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:07,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:07,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:07,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34132022] [2024-09-15 18:57:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34132022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821456655] [2024-09-15 18:57:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:57:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:08,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:08,104 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:08,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-15 18:57:08,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:57:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:08,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:57:08,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:08,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:08,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821456655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:08,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:08,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 44 [2024-09-15 18:57:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120562234] [2024-09-15 18:57:08,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:08,681 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:57:08,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:08,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:57:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:57:08,682 INFO L87 Difference]: Start difference. First operand 839 states and 943 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:09,580 INFO L93 Difference]: Finished difference Result 845 states and 948 transitions. [2024-09-15 18:57:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:57:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:09,585 INFO L225 Difference]: With dead ends: 845 [2024-09-15 18:57:09,585 INFO L226 Difference]: Without dead ends: 821 [2024-09-15 18:57:09,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:09,591 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 56 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:09,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2048 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:57:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2024-09-15 18:57:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2024-09-15 18:57:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 713 states have (on average 1.1430575035063113) internal successors, (815), 779 states have internal predecessors, (815), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2024-09-15 18:57:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 923 transitions. [2024-09-15 18:57:09,984 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 923 transitions. Word has length 54 [2024-09-15 18:57:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:09,984 INFO L474 AbstractCegarLoop]: Abstraction has 821 states and 923 transitions. [2024-09-15 18:57:09,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:09,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 923 transitions. [2024-09-15 18:57:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:09,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:09,990 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2024-09-15 18:57:10,002 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:10,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:10,190 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:10,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1620066373, now seen corresponding path program 85 times [2024-09-15 18:57:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:10,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160641835] [2024-09-15 18:57:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:10,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:10,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:10,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:10,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160641835] [2024-09-15 18:57:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160641835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512022403] [2024-09-15 18:57:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:57:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:10,621 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:10,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-15 18:57:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:10,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:57:10,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:11,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512022403] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:11,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:11,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 44 [2024-09-15 18:57:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816499454] [2024-09-15 18:57:11,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:11,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:57:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:57:11,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:57:11,225 INFO L87 Difference]: Start difference. First operand 821 states and 923 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:12,027 INFO L93 Difference]: Finished difference Result 827 states and 928 transitions. [2024-09-15 18:57:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:57:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:12,033 INFO L225 Difference]: With dead ends: 827 [2024-09-15 18:57:12,033 INFO L226 Difference]: Without dead ends: 801 [2024-09-15 18:57:12,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:12,041 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:12,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1474 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:57:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-09-15 18:57:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2024-09-15 18:57:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 696 states have (on average 1.1436781609195403) internal successors, (796), 760 states have internal predecessors, (796), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2024-09-15 18:57:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 901 transitions. [2024-09-15 18:57:12,437 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 901 transitions. Word has length 54 [2024-09-15 18:57:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:12,437 INFO L474 AbstractCegarLoop]: Abstraction has 801 states and 901 transitions. [2024-09-15 18:57:12,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:12,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 901 transitions. [2024-09-15 18:57:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:12,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:12,445 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:12,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:12,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:12,646 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:12,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1081658783, now seen corresponding path program 86 times [2024-09-15 18:57:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:12,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351522743] [2024-09-15 18:57:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:12,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:12,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:12,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:12,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:13,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:13,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351522743] [2024-09-15 18:57:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351522743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:13,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032650644] [2024-09-15 18:57:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:13,029 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-15 18:57:13,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:13,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 18:57:13,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:13,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:13,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032650644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:13,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:13,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2024-09-15 18:57:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54332387] [2024-09-15 18:57:13,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:13,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-15 18:57:13,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-15 18:57:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 18:57:13,660 INFO L87 Difference]: Start difference. First operand 801 states and 901 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:14,317 INFO L93 Difference]: Finished difference Result 817 states and 920 transitions. [2024-09-15 18:57:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:57:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-15 18:57:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:14,324 INFO L225 Difference]: With dead ends: 817 [2024-09-15 18:57:14,324 INFO L226 Difference]: Without dead ends: 811 [2024-09-15 18:57:14,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:14,331 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:14,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 810 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:57:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2024-09-15 18:57:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 809. [2024-09-15 18:57:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 701 states have (on average 1.145506419400856) internal successors, (803), 767 states have internal predecessors, (803), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2024-09-15 18:57:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 912 transitions. [2024-09-15 18:57:14,722 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 912 transitions. Word has length 54 [2024-09-15 18:57:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:14,722 INFO L474 AbstractCegarLoop]: Abstraction has 809 states and 912 transitions. [2024-09-15 18:57:14,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:14,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 912 transitions. [2024-09-15 18:57:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:57:14,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:14,728 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, 1, 1, 1, 1] [2024-09-15 18:57:14,739 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-09-15 18:57:14,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2024-09-15 18:57:14,928 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:14,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1940349234, now seen corresponding path program 87 times [2024-09-15 18:57:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497639577] [2024-09-15 18:57:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497639577] [2024-09-15 18:57:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497639577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732085667] [2024-09-15 18:57:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:57:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:15,513 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:15,514 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-15 18:57:15,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-15 18:57:15,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:15,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:57:15,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:16,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:17,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732085667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:17,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-15 18:57:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994341088] [2024-09-15 18:57:17,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:17,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-15 18:57:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:17,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-15 18:57:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-15 18:57:17,861 INFO L87 Difference]: Start difference. First operand 809 states and 912 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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) [2024-09-15 18:57:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:20,362 INFO L93 Difference]: Finished difference Result 917 states and 1041 transitions. [2024-09-15 18:57:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:57:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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 55 [2024-09-15 18:57:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:20,376 INFO L225 Difference]: With dead ends: 917 [2024-09-15 18:57:20,376 INFO L226 Difference]: Without dead ends: 904 [2024-09-15 18:57:20,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-15 18:57:20,384 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:20,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1008 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:57:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-09-15 18:57:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2024-09-15 18:57:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 776 states have (on average 1.1443298969072164) internal successors, (888), 850 states have internal predecessors, (888), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2024-09-15 18:57:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1013 transitions. [2024-09-15 18:57:20,823 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1013 transitions. Word has length 55 [2024-09-15 18:57:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:20,823 INFO L474 AbstractCegarLoop]: Abstraction has 896 states and 1013 transitions. [2024-09-15 18:57:20,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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) [2024-09-15 18:57:20,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1013 transitions. [2024-09-15 18:57:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:57:20,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:20,829 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, 1, 1, 1, 1] [2024-09-15 18:57:20,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:21,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-15 18:57:21,029 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:21,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1182927429, now seen corresponding path program 88 times [2024-09-15 18:57:21,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:21,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108749070] [2024-09-15 18:57:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:21,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:21,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:21,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108749070] [2024-09-15 18:57:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108749070] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559374023] [2024-09-15 18:57:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:57:21,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:21,617 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-15 18:57:21,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:57:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:21,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:57:21,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:22,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559374023] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:24,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:24,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-15 18:57:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749219749] [2024-09-15 18:57:24,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:24,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-15 18:57:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-15 18:57:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-15 18:57:24,017 INFO L87 Difference]: Start difference. First operand 896 states and 1013 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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) [2024-09-15 18:57:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:26,539 INFO L93 Difference]: Finished difference Result 910 states and 1027 transitions. [2024-09-15 18:57:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:57:26,539 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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 55 [2024-09-15 18:57:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:26,544 INFO L225 Difference]: With dead ends: 910 [2024-09-15 18:57:26,544 INFO L226 Difference]: Without dead ends: 899 [2024-09-15 18:57:26,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-15 18:57:26,552 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:26,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1256 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:57:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-09-15 18:57:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2024-09-15 18:57:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 777 states have (on average 1.1441441441441442) internal successors, (889), 851 states have internal predecessors, (889), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-15 18:57:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1009 transitions. [2024-09-15 18:57:27,012 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1009 transitions. Word has length 55 [2024-09-15 18:57:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:27,012 INFO L474 AbstractCegarLoop]: Abstraction has 897 states and 1009 transitions. [2024-09-15 18:57:27,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 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) [2024-09-15 18:57:27,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1009 transitions. [2024-09-15 18:57:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:57:27,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:27,019 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:27,030 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:27,219 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:27,219 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:27,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1734206310, now seen corresponding path program 89 times [2024-09-15 18:57:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:27,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748581601] [2024-09-15 18:57:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748581601] [2024-09-15 18:57:27,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748581601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899403552] [2024-09-15 18:57:27,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:57:27,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:27,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:27,353 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:27,354 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-15 18:57:27,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:57:27,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:27,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 18:57:27,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:27,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:27,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899403552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:27,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:27,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-15 18:57:27,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016034532] [2024-09-15 18:57:27,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:27,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:57:27,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:27,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:57:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:57:27,638 INFO L87 Difference]: Start difference. First operand 897 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:28,349 INFO L93 Difference]: Finished difference Result 1477 states and 1656 transitions. [2024-09-15 18:57:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-15 18:57:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-09-15 18:57:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:28,373 INFO L225 Difference]: With dead ends: 1477 [2024-09-15 18:57:28,373 INFO L226 Difference]: Without dead ends: 1007 [2024-09-15 18:57:28,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:57:28,383 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:28,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 306 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-09-15 18:57:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2024-09-15 18:57:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 887 states have (on average 1.1409244644870349) internal successors, (1012), 961 states have internal predecessors, (1012), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-15 18:57:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1132 transitions. [2024-09-15 18:57:28,893 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1132 transitions. Word has length 55 [2024-09-15 18:57:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:28,894 INFO L474 AbstractCegarLoop]: Abstraction has 1007 states and 1132 transitions. [2024-09-15 18:57:28,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:28,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1132 transitions. [2024-09-15 18:57:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:57:28,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:28,900 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:28,912 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-09-15 18:57:29,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:29,100 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:29,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1957341813, now seen corresponding path program 90 times [2024-09-15 18:57:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433147356] [2024-09-15 18:57:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:29,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433147356] [2024-09-15 18:57:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433147356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338041655] [2024-09-15 18:57:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:57:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:29,241 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-15 18:57:29,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:57:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:29,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 18:57:29,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:29,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-15 18:57:29,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338041655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:29,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:29,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-15 18:57:29,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667694089] [2024-09-15 18:57:29,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:29,533 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:57:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:57:29,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:57:29,533 INFO L87 Difference]: Start difference. First operand 1007 states and 1132 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:57:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:30,318 INFO L93 Difference]: Finished difference Result 1159 states and 1321 transitions. [2024-09-15 18:57:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-15 18:57:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 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 55 [2024-09-15 18:57:30,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:30,325 INFO L225 Difference]: With dead ends: 1159 [2024-09-15 18:57:30,325 INFO L226 Difference]: Without dead ends: 1117 [2024-09-15 18:57:30,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:57:30,335 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:30,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-15 18:57:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-15 18:57:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-15 18:57:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1255 transitions. [2024-09-15 18:57:30,844 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1255 transitions. Word has length 55 [2024-09-15 18:57:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:30,844 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1255 transitions. [2024-09-15 18:57:30,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:57:30,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1255 transitions. [2024-09-15 18:57:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:30,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:30,852 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, 1, 1, 1, 1] [2024-09-15 18:57:30,864 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:31,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:31,052 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:31,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1258392964, now seen corresponding path program 91 times [2024-09-15 18:57:31,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:31,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747403039] [2024-09-15 18:57:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:31,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:31,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:31,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:57:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747403039] [2024-09-15 18:57:31,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747403039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762308412] [2024-09-15 18:57:31,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:57:31,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:31,707 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:31,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-15 18:57:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-15 18:57:31,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:57:32,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:57:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762308412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:32,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 46 [2024-09-15 18:57:32,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746874018] [2024-09-15 18:57:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:32,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:32,237 INFO L87 Difference]: Start difference. First operand 1117 states and 1255 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:33,816 INFO L93 Difference]: Finished difference Result 1247 states and 1402 transitions. [2024-09-15 18:57:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-15 18:57:33,816 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:33,826 INFO L225 Difference]: With dead ends: 1247 [2024-09-15 18:57:33,826 INFO L226 Difference]: Without dead ends: 1241 [2024-09-15 18:57:33,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:33,837 INFO L434 NwaCegarLoop]: 117 mSDtfsCounter, 128 mSDsluCounter, 4344 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:33,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 4461 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 18:57:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2024-09-15 18:57:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1131. [2024-09-15 18:57:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1008 states have (on average 1.1388888888888888) internal successors, (1148), 1084 states have internal predecessors, (1148), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2024-09-15 18:57:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1272 transitions. [2024-09-15 18:57:34,414 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1272 transitions. Word has length 56 [2024-09-15 18:57:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:34,414 INFO L474 AbstractCegarLoop]: Abstraction has 1131 states and 1272 transitions. [2024-09-15 18:57:34,414 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:34,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1272 transitions. [2024-09-15 18:57:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:34,423 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:34,423 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:34,435 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:34,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-15 18:57:34,623 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:34,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2056222844, now seen corresponding path program 92 times [2024-09-15 18:57:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:34,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549021664] [2024-09-15 18:57:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:34,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:34,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:34,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:35,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549021664] [2024-09-15 18:57:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549021664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126909001] [2024-09-15 18:57:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:35,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:35,251 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:35,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-15 18:57:35,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:35,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 18:57:35,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:35,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:35,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126909001] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:35,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 46 [2024-09-15 18:57:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339435617] [2024-09-15 18:57:35,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:35,797 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1967, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:35,798 INFO L87 Difference]: Start difference. First operand 1131 states and 1272 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:37,278 INFO L93 Difference]: Finished difference Result 1137 states and 1277 transitions. [2024-09-15 18:57:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:57:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:37,283 INFO L225 Difference]: With dead ends: 1137 [2024-09-15 18:57:37,283 INFO L226 Difference]: Without dead ends: 1117 [2024-09-15 18:57:37,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:37,293 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:37,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3823 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:57:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-15 18:57:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-15 18:57:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-15 18:57:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1256 transitions. [2024-09-15 18:57:37,809 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1256 transitions. Word has length 56 [2024-09-15 18:57:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:37,809 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1256 transitions. [2024-09-15 18:57:37,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:37,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1256 transitions. [2024-09-15 18:57:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:37,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:37,817 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:37,829 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:38,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-15 18:57:38,017 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:38,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash 114260604, now seen corresponding path program 93 times [2024-09-15 18:57:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815493703] [2024-09-15 18:57:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:38,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:38,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:38,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:38,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:38,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815493703] [2024-09-15 18:57:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815493703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:38,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744172363] [2024-09-15 18:57:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:57:38,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:38,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:38,676 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-15 18:57:38,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 18:57:38,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:38,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 18:57:38,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:39,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:57:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744172363] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:39,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:39,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 46 [2024-09-15 18:57:39,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344975886] [2024-09-15 18:57:39,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:39,300 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:39,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1963, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:39,301 INFO L87 Difference]: Start difference. First operand 1117 states and 1256 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:40,782 INFO L93 Difference]: Finished difference Result 1123 states and 1261 transitions. [2024-09-15 18:57:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-15 18:57:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:40,788 INFO L225 Difference]: With dead ends: 1123 [2024-09-15 18:57:40,788 INFO L226 Difference]: Without dead ends: 1101 [2024-09-15 18:57:40,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:40,798 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:40,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3109 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:57:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-15 18:57:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-09-15 18:57:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 984 states have (on average 1.1382113821138211) internal successors, (1120), 1056 states have internal predecessors, (1120), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2024-09-15 18:57:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1238 transitions. [2024-09-15 18:57:41,361 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1238 transitions. Word has length 56 [2024-09-15 18:57:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:41,361 INFO L474 AbstractCegarLoop]: Abstraction has 1101 states and 1238 transitions. [2024-09-15 18:57:41,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:41,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1238 transitions. [2024-09-15 18:57:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:41,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:41,369 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:41,381 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2024-09-15 18:57:41,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-15 18:57:41,569 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:41,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:41,569 INFO L85 PathProgramCache]: Analyzing trace with hash 129396860, now seen corresponding path program 94 times [2024-09-15 18:57:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:41,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073128029] [2024-09-15 18:57:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:41,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:41,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:41,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073128029] [2024-09-15 18:57:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073128029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687069875] [2024-09-15 18:57:42,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:57:42,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:42,084 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:42,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-15 18:57:42,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:57:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:42,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:57:42,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:42,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:57:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687069875] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:42,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:42,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 46 [2024-09-15 18:57:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315079507] [2024-09-15 18:57:42,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:42,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:42,690 INFO L87 Difference]: Start difference. First operand 1101 states and 1238 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:43,798 INFO L93 Difference]: Finished difference Result 1107 states and 1243 transitions. [2024-09-15 18:57:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:57:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:43,804 INFO L225 Difference]: With dead ends: 1107 [2024-09-15 18:57:43,804 INFO L226 Difference]: Without dead ends: 1083 [2024-09-15 18:57:43,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:43,814 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:43,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2265 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:57:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-09-15 18:57:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2024-09-15 18:57:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 969 states have (on average 1.1382868937048503) internal successors, (1103), 1039 states have internal predecessors, (1103), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2024-09-15 18:57:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1218 transitions. [2024-09-15 18:57:44,363 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1218 transitions. Word has length 56 [2024-09-15 18:57:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:44,363 INFO L474 AbstractCegarLoop]: Abstraction has 1083 states and 1218 transitions. [2024-09-15 18:57:44,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:44,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1218 transitions. [2024-09-15 18:57:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:44,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:44,370 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2024-09-15 18:57:44,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-09-15 18:57:44,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-15 18:57:44,571 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:44,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash 47219324, now seen corresponding path program 95 times [2024-09-15 18:57:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:44,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711780643] [2024-09-15 18:57:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:44,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:44,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:44,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:45,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:45,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711780643] [2024-09-15 18:57:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711780643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:45,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945721414] [2024-09-15 18:57:45,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:57:45,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:45,059 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:45,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-15 18:57:45,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:57:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:45,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-15 18:57:45,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:45,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:57:45,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945721414] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:45,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:45,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 46 [2024-09-15 18:57:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155767379] [2024-09-15 18:57:45,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:45,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:45,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:45,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:45,649 INFO L87 Difference]: Start difference. First operand 1083 states and 1218 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:46,652 INFO L93 Difference]: Finished difference Result 1089 states and 1223 transitions. [2024-09-15 18:57:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:57:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:46,658 INFO L225 Difference]: With dead ends: 1089 [2024-09-15 18:57:46,658 INFO L226 Difference]: Without dead ends: 1063 [2024-09-15 18:57:46,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:46,668 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:46,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1613 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:57:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2024-09-15 18:57:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2024-09-15 18:57:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 952 states have (on average 1.138655462184874) internal successors, (1084), 1020 states have internal predecessors, (1084), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2024-09-15 18:57:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1196 transitions. [2024-09-15 18:57:47,219 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1196 transitions. Word has length 56 [2024-09-15 18:57:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:47,219 INFO L474 AbstractCegarLoop]: Abstraction has 1063 states and 1196 transitions. [2024-09-15 18:57:47,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:47,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1196 transitions. [2024-09-15 18:57:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:47,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:47,227 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:47,239 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-09-15 18:57:47,427 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:47,427 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:47,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2023403059, now seen corresponding path program 96 times [2024-09-15 18:57:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:47,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213886791] [2024-09-15 18:57:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:47,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:47,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:47,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:47,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:57:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-15 18:57:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213886791] [2024-09-15 18:57:47,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213886791] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:47,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177979920] [2024-09-15 18:57:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:57:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:47,793 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-15 18:57:47,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:57:47,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:47,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:57:47,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:57:48,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:57:48,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177979920] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:48,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:48,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-15 18:57:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198731828] [2024-09-15 18:57:48,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:48,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-15 18:57:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-15 18:57:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:48,912 INFO L87 Difference]: Start difference. First operand 1063 states and 1196 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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) [2024-09-15 18:57:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:50,306 INFO L93 Difference]: Finished difference Result 1143 states and 1298 transitions. [2024-09-15 18:57:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 18:57:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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 56 [2024-09-15 18:57:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:50,338 INFO L225 Difference]: With dead ends: 1143 [2024-09-15 18:57:50,338 INFO L226 Difference]: Without dead ends: 1125 [2024-09-15 18:57:50,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-15 18:57:50,355 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:50,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 879 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:57:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-09-15 18:57:50,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1121. [2024-09-15 18:57:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 977 states have (on average 1.1340839303991812) internal successors, (1108), 1067 states have internal predecessors, (1108), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-15 18:57:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1264 transitions. [2024-09-15 18:57:50,928 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1264 transitions. Word has length 56 [2024-09-15 18:57:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:50,928 INFO L474 AbstractCegarLoop]: Abstraction has 1121 states and 1264 transitions. [2024-09-15 18:57:50,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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) [2024-09-15 18:57:50,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1264 transitions. [2024-09-15 18:57:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:50,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:50,936 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2024-09-15 18:57:50,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-09-15 18:57:51,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-15 18:57:51,137 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2053990524, now seen corresponding path program 97 times [2024-09-15 18:57:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233502665] [2024-09-15 18:57:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:51,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:51,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:51,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233502665] [2024-09-15 18:57:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233502665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255915652] [2024-09-15 18:57:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:57:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:51,582 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:51,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-15 18:57:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:51,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:57:51,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:52,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:57:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255915652] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:52,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:52,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-09-15 18:57:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629756254] [2024-09-15 18:57:52,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:52,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:57:52,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:57:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:57:52,255 INFO L87 Difference]: Start difference. First operand 1121 states and 1264 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:53,252 INFO L93 Difference]: Finished difference Result 1137 states and 1284 transitions. [2024-09-15 18:57:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:57:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-15 18:57:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:53,263 INFO L225 Difference]: With dead ends: 1137 [2024-09-15 18:57:53,263 INFO L226 Difference]: Without dead ends: 1119 [2024-09-15 18:57:53,274 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 18:57:53,274 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:53,274 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1130 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-09-15 18:57:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1115. [2024-09-15 18:57:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 971 states have (on average 1.1359423274974254) internal successors, (1103), 1061 states have internal predecessors, (1103), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-15 18:57:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1259 transitions. [2024-09-15 18:57:53,810 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1259 transitions. Word has length 56 [2024-09-15 18:57:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:53,810 INFO L474 AbstractCegarLoop]: Abstraction has 1115 states and 1259 transitions. [2024-09-15 18:57:53,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:57:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1259 transitions. [2024-09-15 18:57:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-15 18:57:53,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:53,819 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:53,831 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:54,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-09-15 18:57:54,020 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:54,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1507543379, now seen corresponding path program 98 times [2024-09-15 18:57:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:54,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12887640] [2024-09-15 18:57:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:54,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:54,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:54,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:57:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-15 18:57:54,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12887640] [2024-09-15 18:57:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12887640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744371265] [2024-09-15 18:57:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:54,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:54,383 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:54,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-15 18:57:54,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:54,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:54,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:57:54,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:57:54,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 18:57:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744371265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:55,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:55,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-15 18:57:55,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691726774] [2024-09-15 18:57:55,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:55,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-15 18:57:55,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-15 18:57:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:57:55,563 INFO L87 Difference]: Start difference. First operand 1115 states and 1259 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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) [2024-09-15 18:57:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:56,838 INFO L93 Difference]: Finished difference Result 1127 states and 1270 transitions. [2024-09-15 18:57:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 18:57:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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 56 [2024-09-15 18:57:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:56,844 INFO L225 Difference]: With dead ends: 1127 [2024-09-15 18:57:56,844 INFO L226 Difference]: Without dead ends: 1101 [2024-09-15 18:57:56,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-15 18:57:56,855 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:56,855 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 787 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:57:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-15 18:57:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2024-09-15 18:57:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 955 states have (on average 1.1361256544502618) internal successors, (1085), 1045 states have internal predecessors, (1085), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2024-09-15 18:57:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1231 transitions. [2024-09-15 18:57:57,438 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1231 transitions. Word has length 56 [2024-09-15 18:57:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:57,438 INFO L474 AbstractCegarLoop]: Abstraction has 1099 states and 1231 transitions. [2024-09-15 18:57:57,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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) [2024-09-15 18:57:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1231 transitions. [2024-09-15 18:57:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 18:57:57,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:57,447 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, 1, 1, 1, 1] [2024-09-15 18:57:57,459 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:57,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-09-15 18:57:57,647 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 697142747, now seen corresponding path program 99 times [2024-09-15 18:57:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112335256] [2024-09-15 18:57:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:57,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:57,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:57,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:57:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:58,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112335256] [2024-09-15 18:57:58,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112335256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093560540] [2024-09-15 18:57:58,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:57:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:58,326 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:58,326 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-15 18:57:58,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-15 18:57:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:58,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 18:57:58,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:57:59,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:58:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093560540] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:01,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-15 18:58:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695542682] [2024-09-15 18:58:01,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:01,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-15 18:58:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-15 18:58:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-15 18:58:01,052 INFO L87 Difference]: Start difference. First operand 1099 states and 1231 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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) [2024-09-15 18:58:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:04,379 INFO L93 Difference]: Finished difference Result 1231 states and 1388 transitions. [2024-09-15 18:58:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-15 18:58:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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 57 [2024-09-15 18:58:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:04,400 INFO L225 Difference]: With dead ends: 1231 [2024-09-15 18:58:04,400 INFO L226 Difference]: Without dead ends: 1218 [2024-09-15 18:58:04,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-15 18:58:04,414 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:04,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1268 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:58:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-15 18:58:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1210. [2024-09-15 18:58:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1051 states have (on average 1.1351094196003806) internal successors, (1193), 1151 states have internal predecessors, (1193), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2024-09-15 18:58:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1359 transitions. [2024-09-15 18:58:05,007 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1359 transitions. Word has length 57 [2024-09-15 18:58:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:05,007 INFO L474 AbstractCegarLoop]: Abstraction has 1210 states and 1359 transitions. [2024-09-15 18:58:05,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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) [2024-09-15 18:58:05,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:05,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1359 transitions. [2024-09-15 18:58:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 18:58:05,017 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:05,017 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, 1, 1, 1, 1] [2024-09-15 18:58:05,030 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-09-15 18:58:05,218 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-15 18:58:05,218 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:05,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1635153294, now seen corresponding path program 100 times [2024-09-15 18:58:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:05,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627881559] [2024-09-15 18:58:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:05,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:05,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:05,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:05,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:58:06,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:06,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627881559] [2024-09-15 18:58:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627881559] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045850215] [2024-09-15 18:58:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:58:06,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:06,127 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:06,128 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-15 18:58:06,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:58:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:06,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 18:58:06,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:58:07,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:58:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045850215] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:08,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:08,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-15 18:58:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727705220] [2024-09-15 18:58:08,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:08,971 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-15 18:58:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-15 18:58:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-15 18:58:08,972 INFO L87 Difference]: Start difference. First operand 1210 states and 1359 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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) [2024-09-15 18:58:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:12,209 INFO L93 Difference]: Finished difference Result 1224 states and 1373 transitions. [2024-09-15 18:58:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-15 18:58:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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 57 [2024-09-15 18:58:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:12,219 INFO L225 Difference]: With dead ends: 1224 [2024-09-15 18:58:12,219 INFO L226 Difference]: Without dead ends: 1213 [2024-09-15 18:58:12,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-15 18:58:12,238 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:12,239 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1505 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:58:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2024-09-15 18:58:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1211. [2024-09-15 18:58:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1052 states have (on average 1.1349809885931559) internal successors, (1194), 1152 states have internal predecessors, (1194), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-09-15 18:58:12,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1354 transitions. [2024-09-15 18:58:12,903 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1354 transitions. Word has length 57 [2024-09-15 18:58:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:12,904 INFO L474 AbstractCegarLoop]: Abstraction has 1211 states and 1354 transitions. [2024-09-15 18:58:12,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 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) [2024-09-15 18:58:12,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1354 transitions. [2024-09-15 18:58:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 18:58:12,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:12,914 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 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, 1, 1] [2024-09-15 18:58:12,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-09-15 18:58:13,114 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:13,115 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:13,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -201882063, now seen corresponding path program 101 times [2024-09-15 18:58:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993421946] [2024-09-15 18:58:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:13,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:13,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:13,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:13,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993421946] [2024-09-15 18:58:13,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993421946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:13,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209118058] [2024-09-15 18:58:13,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:58:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:13,267 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:13,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-15 18:58:13,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:58:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:13,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:58:13,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:13,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209118058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-15 18:58:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724984364] [2024-09-15 18:58:13,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:13,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:58:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:58:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:58:13,588 INFO L87 Difference]: Start difference. First operand 1211 states and 1354 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:58:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:14,490 INFO L93 Difference]: Finished difference Result 1250 states and 1403 transitions. [2024-09-15 18:58:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-15 18:58:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 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 57 [2024-09-15 18:58:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:14,497 INFO L225 Difference]: With dead ends: 1250 [2024-09-15 18:58:14,497 INFO L226 Difference]: Without dead ends: 1218 [2024-09-15 18:58:14,511 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:58:14,511 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:14,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:58:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-15 18:58:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1208. [2024-09-15 18:58:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1055 states have (on average 1.1308056872037915) internal successors, (1193), 1151 states have internal predecessors, (1193), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-15 18:58:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1345 transitions. [2024-09-15 18:58:15,129 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1345 transitions. Word has length 57 [2024-09-15 18:58:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:15,129 INFO L474 AbstractCegarLoop]: Abstraction has 1208 states and 1345 transitions. [2024-09-15 18:58:15,129 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-15 18:58:15,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1345 transitions. [2024-09-15 18:58:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 18:58:15,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:15,139 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 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, 1, 1] [2024-09-15 18:58:15,151 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2024-09-15 18:58:15,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:15,340 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:15,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:15,340 INFO L85 PathProgramCache]: Analyzing trace with hash -561571686, now seen corresponding path program 102 times [2024-09-15 18:58:15,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:15,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623228617] [2024-09-15 18:58:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:15,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:15,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:15,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:15,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:58:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:15,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:15,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623228617] [2024-09-15 18:58:15,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623228617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:15,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151312710] [2024-09-15 18:58:15,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:58:15,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:15,486 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:15,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-15 18:58:15,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:58:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:15,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:58:15,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:15,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-15 18:58:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151312710] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:15,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:15,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-15 18:58:15,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34751896] [2024-09-15 18:58:15,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:15,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:58:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:58:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:58:15,797 INFO L87 Difference]: Start difference. First operand 1208 states and 1345 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:16,739 INFO L93 Difference]: Finished difference Result 1834 states and 2016 transitions. [2024-09-15 18:58:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-15 18:58:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-09-15 18:58:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:16,775 INFO L225 Difference]: With dead ends: 1834 [2024-09-15 18:58:16,775 INFO L226 Difference]: Without dead ends: 1221 [2024-09-15 18:58:16,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:58:16,793 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:16,793 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:58:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-15 18:58:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-15 18:58:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-15 18:58:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1358 transitions. [2024-09-15 18:58:17,411 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1358 transitions. Word has length 57 [2024-09-15 18:58:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:17,411 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1358 transitions. [2024-09-15 18:58:17,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:17,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:17,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1358 transitions. [2024-09-15 18:58:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:17,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:17,422 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, 1, 1, 1, 1] [2024-09-15 18:58:17,434 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-09-15 18:58:17,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-15 18:58:17,623 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:17,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:17,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1902474405, now seen corresponding path program 103 times [2024-09-15 18:58:17,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:17,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384448173] [2024-09-15 18:58:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:17,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:17,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:17,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:17,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:58:18,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384448173] [2024-09-15 18:58:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384448173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596600022] [2024-09-15 18:58:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:58:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:18,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:18,328 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:18,329 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-15 18:58:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:18,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-15 18:58:18,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:58:18,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:58:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596600022] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:18,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 48 [2024-09-15 18:58:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701073668] [2024-09-15 18:58:18,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:18,833 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2153, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:18,834 INFO L87 Difference]: Start difference. First operand 1221 states and 1358 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:20,773 INFO L93 Difference]: Finished difference Result 1357 states and 1511 transitions. [2024-09-15 18:58:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-15 18:58:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:20,786 INFO L225 Difference]: With dead ends: 1357 [2024-09-15 18:58:20,786 INFO L226 Difference]: Without dead ends: 1351 [2024-09-15 18:58:20,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:20,801 INFO L434 NwaCegarLoop]: 123 mSDtfsCounter, 137 mSDsluCounter, 5054 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:20,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 5177 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:58:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2024-09-15 18:58:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1235. [2024-09-15 18:58:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1079 states have (on average 1.1297497683039852) internal successors, (1219), 1177 states have internal predecessors, (1219), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2024-09-15 18:58:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1375 transitions. [2024-09-15 18:58:21,430 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1375 transitions. Word has length 58 [2024-09-15 18:58:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:21,430 INFO L474 AbstractCegarLoop]: Abstraction has 1235 states and 1375 transitions. [2024-09-15 18:58:21,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:21,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1375 transitions. [2024-09-15 18:58:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:21,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:21,441 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:58:21,454 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-09-15 18:58:21,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:21,642 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:21,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:21,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1757191105, now seen corresponding path program 104 times [2024-09-15 18:58:21,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:21,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290741867] [2024-09-15 18:58:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:21,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:21,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:21,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:22,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:58:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290741867] [2024-09-15 18:58:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290741867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104061899] [2024-09-15 18:58:22,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:58:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:22,382 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:22,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-15 18:58:22,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:58:22,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:22,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-15 18:58:22,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:58:22,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:58:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104061899] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:22,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 48 [2024-09-15 18:58:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209141406] [2024-09-15 18:58:22,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:22,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2149, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:22,935 INFO L87 Difference]: Start difference. First operand 1235 states and 1375 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:24,671 INFO L93 Difference]: Finished difference Result 1241 states and 1380 transitions. [2024-09-15 18:58:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-15 18:58:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:24,678 INFO L225 Difference]: With dead ends: 1241 [2024-09-15 18:58:24,678 INFO L226 Difference]: Without dead ends: 1221 [2024-09-15 18:58:24,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:24,692 INFO L434 NwaCegarLoop]: 111 mSDtfsCounter, 116 mSDsluCounter, 4707 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:24,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4818 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 18:58:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-15 18:58:25,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-15 18:58:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2024-09-15 18:58:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1359 transitions. [2024-09-15 18:58:25,411 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1359 transitions. Word has length 58 [2024-09-15 18:58:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:25,411 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1359 transitions. [2024-09-15 18:58:25,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:25,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1359 transitions. [2024-09-15 18:58:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:25,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:25,421 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:58:25,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-09-15 18:58:25,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-15 18:58:25,622 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:25,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash -711669595, now seen corresponding path program 105 times [2024-09-15 18:58:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816512137] [2024-09-15 18:58:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:25,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:25,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:25,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:25,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:58:26,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816512137] [2024-09-15 18:58:26,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816512137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762402032] [2024-09-15 18:58:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:58:26,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:26,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:26,231 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:26,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-15 18:58:26,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-15 18:58:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:26,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 18:58:26,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:58:26,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:58:26,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762402032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:26,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:26,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 48 [2024-09-15 18:58:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14174801] [2024-09-15 18:58:26,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:26,823 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2145, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:26,824 INFO L87 Difference]: Start difference. First operand 1221 states and 1359 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:28,324 INFO L93 Difference]: Finished difference Result 1227 states and 1364 transitions. [2024-09-15 18:58:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:58:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:28,332 INFO L225 Difference]: With dead ends: 1227 [2024-09-15 18:58:28,332 INFO L226 Difference]: Without dead ends: 1205 [2024-09-15 18:58:28,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=2725, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:28,352 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 97 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:28,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3662 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:58:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2024-09-15 18:58:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2024-09-15 18:58:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1055 states have (on average 1.128909952606635) internal successors, (1191), 1149 states have internal predecessors, (1191), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2024-09-15 18:58:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1341 transitions. [2024-09-15 18:58:29,047 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1341 transitions. Word has length 58 [2024-09-15 18:58:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:29,047 INFO L474 AbstractCegarLoop]: Abstraction has 1205 states and 1341 transitions. [2024-09-15 18:58:29,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:29,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1341 transitions. [2024-09-15 18:58:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:29,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:29,058 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:58:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-09-15 18:58:29,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-15 18:58:29,258 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -148391999, now seen corresponding path program 106 times [2024-09-15 18:58:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802127678] [2024-09-15 18:58:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:29,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:29,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:29,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:58:29,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:29,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802127678] [2024-09-15 18:58:29,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802127678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:29,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043402938] [2024-09-15 18:58:29,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:58:29,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:29,817 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:29,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-15 18:58:29,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:58:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:29,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 18:58:29,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:58:30,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:58:30,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043402938] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:30,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:30,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 48 [2024-09-15 18:58:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404179112] [2024-09-15 18:58:30,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:30,452 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:30,452 INFO L87 Difference]: Start difference. First operand 1205 states and 1341 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:31,835 INFO L93 Difference]: Finished difference Result 1211 states and 1346 transitions. [2024-09-15 18:58:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-15 18:58:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:31,842 INFO L225 Difference]: With dead ends: 1211 [2024-09-15 18:58:31,843 INFO L226 Difference]: Without dead ends: 1187 [2024-09-15 18:58:31,873 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:31,874 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:31,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2658 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:58:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2024-09-15 18:58:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2024-09-15 18:58:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1040 states have (on average 1.1288461538461538) internal successors, (1174), 1132 states have internal predecessors, (1174), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2024-09-15 18:58:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1321 transitions. [2024-09-15 18:58:32,482 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1321 transitions. Word has length 58 [2024-09-15 18:58:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:32,482 INFO L474 AbstractCegarLoop]: Abstraction has 1187 states and 1321 transitions. [2024-09-15 18:58:32,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:32,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1321 transitions. [2024-09-15 18:58:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:32,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:32,491 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2024-09-15 18:58:32,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-09-15 18:58:32,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:32,691 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:32,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1511996581, now seen corresponding path program 107 times [2024-09-15 18:58:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103235091] [2024-09-15 18:58:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:32,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:32,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:32,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:58:33,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:33,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103235091] [2024-09-15 18:58:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103235091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:33,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986329159] [2024-09-15 18:58:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:58:33,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:33,211 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:33,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-15 18:58:33,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:58:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:33,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:58:33,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:58:33,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 18:58:33,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986329159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:33,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:33,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 48 [2024-09-15 18:58:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085241171] [2024-09-15 18:58:33,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:33,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:33,886 INFO L87 Difference]: Start difference. First operand 1187 states and 1321 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:35,188 INFO L93 Difference]: Finished difference Result 1193 states and 1326 transitions. [2024-09-15 18:58:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 18:58:35,189 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:35,195 INFO L225 Difference]: With dead ends: 1193 [2024-09-15 18:58:35,195 INFO L226 Difference]: Without dead ends: 1167 [2024-09-15 18:58:35,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=2717, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:35,206 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:35,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2279 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:58:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2024-09-15 18:58:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2024-09-15 18:58:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1113 states have internal predecessors, (1155), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2024-09-15 18:58:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1299 transitions. [2024-09-15 18:58:35,805 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1299 transitions. Word has length 58 [2024-09-15 18:58:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:35,805 INFO L474 AbstractCegarLoop]: Abstraction has 1167 states and 1299 transitions. [2024-09-15 18:58:35,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:35,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1299 transitions. [2024-09-15 18:58:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:35,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:35,814 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2024-09-15 18:58:35,826 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-09-15 18:58:36,014 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:36,014 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:36,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1143491647, now seen corresponding path program 108 times [2024-09-15 18:58:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:36,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980008596] [2024-09-15 18:58:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:36,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:36,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:36,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:58:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:36,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980008596] [2024-09-15 18:58:36,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980008596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:36,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582225202] [2024-09-15 18:58:36,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:58:36,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:36,491 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:36,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-15 18:58:36,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-15 18:58:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:36,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-15 18:58:36,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:58:37,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 18:58:37,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582225202] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:37,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:37,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 48 [2024-09-15 18:58:37,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915374904] [2024-09-15 18:58:37,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:37,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:37,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:37,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2133, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:37,204 INFO L87 Difference]: Start difference. First operand 1167 states and 1299 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:38,334 INFO L93 Difference]: Finished difference Result 1173 states and 1304 transitions. [2024-09-15 18:58:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:58:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:38,340 INFO L225 Difference]: With dead ends: 1173 [2024-09-15 18:58:38,340 INFO L226 Difference]: Without dead ends: 1145 [2024-09-15 18:58:38,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:38,351 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:38,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1491 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:58:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2024-09-15 18:58:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1145. [2024-09-15 18:58:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1004 states have (on average 1.1294820717131475) internal successors, (1134), 1092 states have internal predecessors, (1134), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2024-09-15 18:58:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1275 transitions. [2024-09-15 18:58:38,932 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1275 transitions. Word has length 58 [2024-09-15 18:58:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:38,932 INFO L474 AbstractCegarLoop]: Abstraction has 1145 states and 1275 transitions. [2024-09-15 18:58:38,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:38,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1275 transitions. [2024-09-15 18:58:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:58:38,940 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:38,940 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 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, 1, 1] [2024-09-15 18:58:38,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-09-15 18:58:39,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2024-09-15 18:58:39,141 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:39,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash -834350939, now seen corresponding path program 109 times [2024-09-15 18:58:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3468816] [2024-09-15 18:58:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:39,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:39,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:39,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:58:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:58:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3468816] [2024-09-15 18:58:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3468816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614965820] [2024-09-15 18:58:39,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:58:39,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:39,581 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:58:39,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-15 18:58:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:39,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:58:39,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:58:40,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 18:58:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614965820] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:40,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:40,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2024-09-15 18:58:40,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150748606] [2024-09-15 18:58:40,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:40,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:58:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:58:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:58:40,319 INFO L87 Difference]: Start difference. First operand 1145 states and 1275 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 18:58:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:41,362 INFO L93 Difference]: Finished difference Result 1161 states and 1294 transitions. [2024-09-15 18:58:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:58:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-15 18:58:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:41,375 INFO L225 Difference]: With dead ends: 1161 [2024-09-15 18:58:41,375 INFO L226 Difference]: Without dead ends: 1155 [2024-09-15 18:58:41,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2024-09-15 18:58:41,387 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:41,387 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 971 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:58:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states.