./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:19:28,029 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:19:28,115 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:19:28,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:19:28,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:19:28,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:19:28,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:19:28,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:19:28,143 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:19:28,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:19:28,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:19:28,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:19:28,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:19:28,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:19:28,145 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:19:28,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:19:28,146 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:19:28,146 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:19:28,147 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:19:28,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:19:28,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:19:28,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:19:28,148 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:19:28,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:19:28,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:19:28,149 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:19:28,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:19:28,150 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:19:28,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:19:28,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:19:28,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:19:28,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:19:28,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:19:28,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:19:28,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:19:28,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:19:28,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:19:28,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:19:28,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:19:28,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:19:28,154 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:19:28,154 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:19:28,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:19:28,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:19:28,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:19:28,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:19:28,414 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:19:28,414 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:19:28,415 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-24 23:19:29,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:19:29,968 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:19:29,968 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-09-24 23:19:29,982 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f05ab7b6e/1acabbaacf24486b8c25eddc593cce28/FLAGb8406075b [2024-09-24 23:19:30,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f05ab7b6e/1acabbaacf24486b8c25eddc593cce28 [2024-09-24 23:19:30,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:19:30,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:19:30,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:19:30,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:19:30,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:19:30,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7d46b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30, skipping insertion in model container [2024-09-24 23:19:30,374 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:19:30,541 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-09-24 23:19:30,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:19:30,568 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:19:30,578 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-09-24 23:19:30,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:19:30,600 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:19:30,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30 WrapperNode [2024-09-24 23:19:30,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:19:30,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:19:30,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:19:30,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:19:30,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,618 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:19:30,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:19:30,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:19:30,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:19:30,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:19:30,628 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,629 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,640 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]. [2024-09-24 23:19:30,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,650 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:19:30,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:19:30,651 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:19:30,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:19:30,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (1/1) ... [2024-09-24 23:19:30,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:19:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:30,682 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) [2024-09-24 23:19:30,687 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 [2024-09-24 23:19:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:19:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:19:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:19:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:19:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:19:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:19:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:19:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:19:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:19:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:19:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:19:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:19:30,781 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:19:30,783 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:19:30,944 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-24 23:19:30,944 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:19:30,964 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:19:30,964 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:19:30,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:19:30 BoogieIcfgContainer [2024-09-24 23:19:30,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:19:30,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:19:30,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:19:30,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:19:30,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:19:30" (1/3) ... [2024-09-24 23:19:30,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447121a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:19:30, skipping insertion in model container [2024-09-24 23:19:30,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:19:30" (2/3) ... [2024-09-24 23:19:30,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447121a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:19:30, skipping insertion in model container [2024-09-24 23:19:30,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:19:30" (3/3) ... [2024-09-24 23:19:30,976 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-09-24 23:19:30,992 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:19:30,993 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:19:31,049 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:19:31,055 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;@5cc5184c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:19:31,056 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:19:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-24 23:19:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:19:31,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:31,069 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:31,069 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:31,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-09-24 23:19:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073953784] [2024-09-24 23:19:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:19:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:19:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:19:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:19:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:19:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:19:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073953784] [2024-09-24 23:19:31,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073953784] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:19:31,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:19:31,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:19:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901846458] [2024-09-24 23:19:31,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:19:31,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:19:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:19:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:19:31,362 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:19:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:31,404 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-09-24 23:19:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:19:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-09-24 23:19:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:31,414 INFO L225 Difference]: With dead ends: 64 [2024-09-24 23:19:31,414 INFO L226 Difference]: Without dead ends: 31 [2024-09-24 23:19:31,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:19:31,423 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:31,425 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:19:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-24 23:19:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-24 23:19:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:19:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-09-24 23:19:31,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-09-24 23:19:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:31,474 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-09-24 23:19:31,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:19:31,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-09-24 23:19:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:19:31,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:31,479 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:31,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:19:31,479 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:31,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-09-24 23:19:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385878377] [2024-09-24 23:19:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:19:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:19:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:19:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:19:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:19:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:19:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385878377] [2024-09-24 23:19:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385878377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:19:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902111338] [2024-09-24 23:19:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:31,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:31,900 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) [2024-09-24 23:19:31,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:19:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:31,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:19:31,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:19:32,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:19:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902111338] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:19:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:19:32,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-09-24 23:19:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693810410] [2024-09-24 23:19:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:19:32,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:19:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:19:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:19:32,166 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:19:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:32,288 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-09-24 23:19:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:19:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-24 23:19:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:32,290 INFO L225 Difference]: With dead ends: 48 [2024-09-24 23:19:32,290 INFO L226 Difference]: Without dead ends: 46 [2024-09-24 23:19:32,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:19:32,292 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:32,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:19:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-24 23:19:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-09-24 23:19:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-24 23:19:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-09-24 23:19:32,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-09-24 23:19:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:32,311 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-09-24 23:19:32,311 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:19:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-09-24 23:19:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:19:32,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:32,313 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:32,325 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:19:32,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:32,514 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:32,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-09-24 23:19:32,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:32,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303590187] [2024-09-24 23:19:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:32,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993354470] [2024-09-24 23:19:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:32,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:32,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:32,552 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) [2024-09-24 23:19:32,563 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:19:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:19:32,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:19:32,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:19:32,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:32,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303590187] [2024-09-24 23:19:32,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:32,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993354470] [2024-09-24 23:19:32,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993354470] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:19:32,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:19:32,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:19:32,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47067688] [2024-09-24 23:19:32,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:19:32,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:19:32,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:19:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:19:32,668 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:19:32,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:32,730 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-09-24 23:19:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:19:32,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-24 23:19:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:32,733 INFO L225 Difference]: With dead ends: 63 [2024-09-24 23:19:32,733 INFO L226 Difference]: Without dead ends: 61 [2024-09-24 23:19:32,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:19:32,737 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:32,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:19:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-24 23:19:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-09-24 23:19:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-24 23:19:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-09-24 23:19:32,764 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-09-24 23:19:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:32,765 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-09-24 23:19:32,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:19:32,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-09-24 23:19:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-24 23:19:32,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:32,766 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:32,783 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:19:32,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:32,967 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:32,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-09-24 23:19:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836184859] [2024-09-24 23:19:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:19:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:19:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:19:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:19:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:19:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:19:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:19:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836184859] [2024-09-24 23:19:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836184859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:19:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793723334] [2024-09-24 23:19:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:33,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:33,102 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) [2024-09-24 23:19:33,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:19:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:19:33,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:19:33,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:19:33,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793723334] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:19:33,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:19:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-24 23:19:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890800330] [2024-09-24 23:19:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:19:33,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:19:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:19:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:19:33,229 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:19:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:33,312 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-24 23:19:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:19:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-24 23:19:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:33,314 INFO L225 Difference]: With dead ends: 60 [2024-09-24 23:19:33,316 INFO L226 Difference]: Without dead ends: 56 [2024-09-24 23:19:33,316 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:19:33,317 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:33,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:19:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-24 23:19:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-24 23:19:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:19:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-24 23:19:33,342 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-09-24 23:19:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:33,343 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-24 23:19:33,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:19:33,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-24 23:19:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-24 23:19:33,347 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:33,348 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] [2024-09-24 23:19:33,364 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:19:33,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:33,549 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:33,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-09-24 23:19:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:33,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661020034] [2024-09-24 23:19:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:33,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889421079] [2024-09-24 23:19:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:33,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:33,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:33,584 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) [2024-09-24 23:19:33,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:19:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:33,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:19:33,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:19:33,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:19:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661020034] [2024-09-24 23:19:33,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889421079] [2024-09-24 23:19:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889421079] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:19:33,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:19:33,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:19:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077419278] [2024-09-24 23:19:33,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:19:33,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:19:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:19:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:19:33,845 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:19:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:33,926 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-09-24 23:19:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:19:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-09-24 23:19:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:33,928 INFO L225 Difference]: With dead ends: 62 [2024-09-24 23:19:33,931 INFO L226 Difference]: Without dead ends: 60 [2024-09-24 23:19:33,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:19:33,932 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:33,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:19:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-24 23:19:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-24 23:19:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-24 23:19:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-09-24 23:19:33,951 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-09-24 23:19:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:33,952 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-09-24 23:19:33,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:19:33,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-09-24 23:19:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-24 23:19:33,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:33,956 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:33,972 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:19:34,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:34,157 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:34,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-09-24 23:19:34,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:34,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889023063] [2024-09-24 23:19:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:34,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:34,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011501836] [2024-09-24 23:19:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:34,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:34,194 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) [2024-09-24 23:19:34,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:19:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:19:34,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-24 23:19:34,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-24 23:19:34,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889023063] [2024-09-24 23:19:34,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011501836] [2024-09-24 23:19:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011501836] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:19:34,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:19:34,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-24 23:19:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665905520] [2024-09-24 23:19:34,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:34,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:19:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:19:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:19:34,425 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-24 23:19:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:34,585 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-09-24 23:19:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:19:34,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-09-24 23:19:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:34,589 INFO L225 Difference]: With dead ends: 87 [2024-09-24 23:19:34,589 INFO L226 Difference]: Without dead ends: 85 [2024-09-24 23:19:34,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:19:34,592 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:34,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:19:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-24 23:19:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-09-24 23:19:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-24 23:19:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-09-24 23:19:34,617 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-09-24 23:19:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:34,617 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-09-24 23:19:34,618 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-24 23:19:34,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-09-24 23:19:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-24 23:19:34,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:34,622 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:34,638 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:19:34,826 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:19:34,827 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:34,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-09-24 23:19:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125221385] [2024-09-24 23:19:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:19:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:19:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:19:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:19:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:19:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:34,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:19:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:19:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:19:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:19:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-24 23:19:35,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:35,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125221385] [2024-09-24 23:19:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125221385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:19:35,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462840264] [2024-09-24 23:19:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:35,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:35,017 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) [2024-09-24 23:19:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:19:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:19:35,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-24 23:19:35,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-24 23:19:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462840264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:19:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:19:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-24 23:19:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037178985] [2024-09-24 23:19:35,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:35,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:19:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:19:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:19:35,229 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-24 23:19:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:35,412 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-09-24 23:19:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:19:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-09-24 23:19:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:35,415 INFO L225 Difference]: With dead ends: 102 [2024-09-24 23:19:35,415 INFO L226 Difference]: Without dead ends: 94 [2024-09-24 23:19:35,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:19:35,416 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:35,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:19:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-24 23:19:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-09-24 23:19:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-24 23:19:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-09-24 23:19:35,450 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-09-24 23:19:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:35,451 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-09-24 23:19:35,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-24 23:19:35,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-09-24 23:19:35,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-24 23:19:35,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:35,454 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:35,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:19:35,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:35,655 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:35,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-09-24 23:19:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699599333] [2024-09-24 23:19:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:35,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581466546] [2024-09-24 23:19:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:35,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:35,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:35,676 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) [2024-09-24 23:19:35,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:19:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:35,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-24 23:19:35,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-24 23:19:36,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:19:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699599333] [2024-09-24 23:19:36,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581466546] [2024-09-24 23:19:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581466546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:19:36,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:19:36,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-24 23:19:36,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860926450] [2024-09-24 23:19:36,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:36,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:19:36,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:36,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:19:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:19:36,263 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-24 23:19:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:37,341 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-24 23:19:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:19:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-09-24 23:19:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:37,344 INFO L225 Difference]: With dead ends: 136 [2024-09-24 23:19:37,344 INFO L226 Difference]: Without dead ends: 133 [2024-09-24 23:19:37,344 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:19:37,345 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:37,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:19:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-24 23:19:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-09-24 23:19:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-24 23:19:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-09-24 23:19:37,382 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-09-24 23:19:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:37,382 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-09-24 23:19:37,383 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-24 23:19:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-09-24 23:19:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-24 23:19:37,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:37,384 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:37,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:19:37,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:37,589 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-09-24 23:19:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920010715] [2024-09-24 23:19:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:37,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447195918] [2024-09-24 23:19:37,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:19:37,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:37,609 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) [2024-09-24 23:19:37,610 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:19:37,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:19:37,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:19:37,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:19:37,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-24 23:19:38,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:19:38,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920010715] [2024-09-24 23:19:38,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447195918] [2024-09-24 23:19:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447195918] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:19:38,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:19:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-24 23:19:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822676763] [2024-09-24 23:19:38,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:38,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:19:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:19:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:19:38,279 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-24 23:19:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:39,552 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-09-24 23:19:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-24 23:19:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-09-24 23:19:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:39,555 INFO L225 Difference]: With dead ends: 243 [2024-09-24 23:19:39,555 INFO L226 Difference]: Without dead ends: 241 [2024-09-24 23:19:39,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:19:39,557 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:39,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:19:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-24 23:19:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-09-24 23:19:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-09-24 23:19:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-09-24 23:19:39,631 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-09-24 23:19:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:39,632 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-09-24 23:19:39,632 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-24 23:19:39,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-09-24 23:19:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-24 23:19:39,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:39,634 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:39,651 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-24 23:19:39,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:39,838 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:39,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:39,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-09-24 23:19:39,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:39,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951851974] [2024-09-24 23:19:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:39,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840466803] [2024-09-24 23:19:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:19:39,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:39,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:39,865 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) [2024-09-24 23:19:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:19:39,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:19:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:19:39,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-24 23:19:39,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-24 23:19:41,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951851974] [2024-09-24 23:19:56,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840466803] [2024-09-24 23:19:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840466803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:19:56,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:19:56,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-24 23:19:56,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713362084] [2024-09-24 23:19:56,098 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:56,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:19:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:19:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:19:56,100 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-24 23:19:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:19:57,940 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-09-24 23:19:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:19:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-09-24 23:19:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:19:57,942 INFO L225 Difference]: With dead ends: 227 [2024-09-24 23:19:57,942 INFO L226 Difference]: Without dead ends: 225 [2024-09-24 23:19:57,943 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:19:57,944 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:19:57,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:19:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-24 23:19:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-09-24 23:19:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-24 23:19:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-09-24 23:19:58,021 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-09-24 23:19:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:19:58,022 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-09-24 23:19:58,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-24 23:19:58,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-09-24 23:19:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-24 23:19:58,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:19:58,024 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:19:58,040 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-24 23:19:58,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:19:58,225 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:19:58,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:19:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-09-24 23:19:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:19:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477871261] [2024-09-24 23:19:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:19:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:19:58,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271408689] [2024-09-24 23:19:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:19:58,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:19:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:19:58,242 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) [2024-09-24 23:19:58,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:19:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:19:58,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-24 23:19:58,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-24 23:19:58,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:19:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-24 23:19:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:19:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477871261] [2024-09-24 23:19:59,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:19:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271408689] [2024-09-24 23:19:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271408689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:19:59,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:19:59,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-24 23:19:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703560435] [2024-09-24 23:19:59,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:19:59,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:19:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:19:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:19:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:19:59,604 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-24 23:20:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:02,533 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-09-24 23:20:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:20:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 79 [2024-09-24 23:20:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:02,538 INFO L225 Difference]: With dead ends: 353 [2024-09-24 23:20:02,540 INFO L226 Difference]: Without dead ends: 349 [2024-09-24 23:20:02,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:20:02,541 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:02,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-24 23:20:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-24 23:20:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-09-24 23:20:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-24 23:20:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-09-24 23:20:02,694 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-09-24 23:20:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:02,694 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-09-24 23:20:02,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-24 23:20:02,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-09-24 23:20:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-24 23:20:02,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:02,696 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:02,710 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 23:20:02,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 23:20:02,900 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:02,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-09-24 23:20:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:02,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815898517] [2024-09-24 23:20:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:02,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611926376] [2024-09-24 23:20:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:02,933 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) [2024-09-24 23:20:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:20:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:02,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-24 23:20:02,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-24 23:20:04,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:05,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815898517] [2024-09-24 23:20:05,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611926376] [2024-09-24 23:20:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611926376] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:20:05,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:20:05,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-24 23:20:05,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749618382] [2024-09-24 23:20:05,884 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:05,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:20:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:20:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:20:05,886 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-24 23:20:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:06,989 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-09-24 23:20:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:20:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-09-24 23:20:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:06,993 INFO L225 Difference]: With dead ends: 358 [2024-09-24 23:20:06,993 INFO L226 Difference]: Without dead ends: 356 [2024-09-24 23:20:06,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:20:06,994 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:06,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:20:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-24 23:20:07,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-09-24 23:20:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-09-24 23:20:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-09-24 23:20:07,169 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-09-24 23:20:07,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:07,170 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-09-24 23:20:07,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-09-24 23:20:07,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-09-24 23:20:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-24 23:20:07,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:07,171 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:07,188 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:20:07,371 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:07,372 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:07,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-09-24 23:20:07,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:07,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324686923] [2024-09-24 23:20:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:07,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:20:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:20:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:20:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:20:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:20:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:20:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:20:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:20:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:20:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-24 23:20:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:20:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:20:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-24 23:20:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-24 23:20:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-24 23:20:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-24 23:20:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-24 23:20:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324686923] [2024-09-24 23:20:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324686923] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:20:07,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:20:07,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:20:07,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584702040] [2024-09-24 23:20:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:20:07,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:20:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:20:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:20:07,515 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:20:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:07,682 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-09-24 23:20:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:20:07,683 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2024-09-24 23:20:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:07,685 INFO L225 Difference]: With dead ends: 426 [2024-09-24 23:20:07,686 INFO L226 Difference]: Without dead ends: 230 [2024-09-24 23:20:07,687 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:20:07,688 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:07,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:20:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-24 23:20:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-09-24 23:20:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-24 23:20:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-09-24 23:20:07,766 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-09-24 23:20:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:07,766 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-09-24 23:20:07,766 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:20:07,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-09-24 23:20:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-24 23:20:07,768 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:07,768 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:07,768 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-24 23:20:07,768 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:07,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-09-24 23:20:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142826438] [2024-09-24 23:20:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:20:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:20:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:20:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:20:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:20:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-24 23:20:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-24 23:20:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-24 23:20:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-24 23:20:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-24 23:20:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-24 23:20:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-24 23:20:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-24 23:20:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-24 23:20:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:20:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-24 23:20:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-24 23:20:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-24 23:20:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-24 23:20:07,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:07,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142826438] [2024-09-24 23:20:07,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142826438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:20:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358285651] [2024-09-24 23:20:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:07,938 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) [2024-09-24 23:20:07,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:20:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:20:08,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:20:08,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-09-24 23:20:08,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-09-24 23:20:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358285651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:20:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:20:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-24 23:20:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814364241] [2024-09-24 23:20:08,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:08,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:20:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:20:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:20:08,108 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-24 23:20:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:08,409 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-09-24 23:20:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:20:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-09-24 23:20:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:08,411 INFO L225 Difference]: With dead ends: 232 [2024-09-24 23:20:08,411 INFO L226 Difference]: Without dead ends: 220 [2024-09-24 23:20:08,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:20:08,412 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:08,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:20:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-09-24 23:20:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-09-24 23:20:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-24 23:20:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-09-24 23:20:08,490 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-09-24 23:20:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:08,491 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-09-24 23:20:08,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-24 23:20:08,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-09-24 23:20:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-24 23:20:08,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:08,493 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:08,509 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:20:08,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:20:08,693 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:08,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-09-24 23:20:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119070847] [2024-09-24 23:20:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936601243] [2024-09-24 23:20:08,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:20:08,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:08,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:08,721 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) [2024-09-24 23:20:08,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:20:08,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:20:08,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:08,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-24 23:20:08,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-09-24 23:20:09,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:09,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:09,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119070847] [2024-09-24 23:20:09,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:09,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936601243] [2024-09-24 23:20:09,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936601243] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:20:09,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:20:09,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-24 23:20:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931944468] [2024-09-24 23:20:09,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:09,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:20:09,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:09,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:20:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:20:09,562 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-24 23:20:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:10,375 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-09-24 23:20:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:20:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-09-24 23:20:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:10,378 INFO L225 Difference]: With dead ends: 231 [2024-09-24 23:20:10,378 INFO L226 Difference]: Without dead ends: 229 [2024-09-24 23:20:10,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:20:10,379 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:10,379 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:20:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-24 23:20:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-09-24 23:20:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-09-24 23:20:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-09-24 23:20:10,479 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-09-24 23:20:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:10,479 INFO L474 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-09-24 23:20:10,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-24 23:20:10,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-09-24 23:20:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-24 23:20:10,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:10,482 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:10,499 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-24 23:20:10,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:20:10,686 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:10,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-09-24 23:20:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:10,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112175555] [2024-09-24 23:20:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:10,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683730546] [2024-09-24 23:20:10,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:20:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:10,713 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) [2024-09-24 23:20:10,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:20:10,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:20:10,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:10,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-24 23:20:10,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-24 23:20:11,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-24 23:20:12,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112175555] [2024-09-24 23:20:12,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:12,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683730546] [2024-09-24 23:20:12,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683730546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:20:12,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:20:12,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-09-24 23:20:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778497035] [2024-09-24 23:20:12,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:12,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:20:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:20:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:20:12,564 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-24 23:20:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:15,235 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-09-24 23:20:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:20:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-09-24 23:20:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:15,238 INFO L225 Difference]: With dead ends: 267 [2024-09-24 23:20:15,238 INFO L226 Difference]: Without dead ends: 265 [2024-09-24 23:20:15,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-24 23:20:15,240 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:15,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-24 23:20:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-24 23:20:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-09-24 23:20:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-24 23:20:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-09-24 23:20:15,389 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-09-24 23:20:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:15,389 INFO L474 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-09-24 23:20:15,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-09-24 23:20:15,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-09-24 23:20:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-24 23:20:15,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:15,391 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:15,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 23:20:15,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:20:15,592 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:15,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-09-24 23:20:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:15,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861225431] [2024-09-24 23:20:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:15,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:15,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857765810] [2024-09-24 23:20:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:20:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:15,614 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) [2024-09-24 23:20:15,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:20:15,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:20:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:15,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-24 23:20:15,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-24 23:20:16,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:16,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:16,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861225431] [2024-09-24 23:20:16,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857765810] [2024-09-24 23:20:16,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857765810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:20:16,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:20:16,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-24 23:20:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312324109] [2024-09-24 23:20:16,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:16,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:20:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:20:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:20:16,805 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:20:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:17,952 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-09-24 23:20:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:20:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-09-24 23:20:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:17,956 INFO L225 Difference]: With dead ends: 295 [2024-09-24 23:20:17,957 INFO L226 Difference]: Without dead ends: 293 [2024-09-24 23:20:17,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:20:17,957 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:17,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-24 23:20:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-24 23:20:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-09-24 23:20:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-24 23:20:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-09-24 23:20:18,093 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-09-24 23:20:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:18,093 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-09-24 23:20:18,093 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:20:18,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-09-24 23:20:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-24 23:20:18,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:18,095 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:18,108 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-24 23:20:18,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:20:18,296 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:18,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-09-24 23:20:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358123607] [2024-09-24 23:20:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668139881] [2024-09-24 23:20:18,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:20:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:18,318 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) [2024-09-24 23:20:18,321 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:20:18,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-24 23:20:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:18,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-24 23:20:18,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-24 23:20:19,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358123607] [2024-09-24 23:20:40,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:40,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668139881] [2024-09-24 23:20:40,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668139881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:20:40,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:20:40,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-24 23:20:40,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460175322] [2024-09-24 23:20:40,551 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:40,552 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:20:40,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:40,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:20:40,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-09-24 23:20:40,553 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:20:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:41,436 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-09-24 23:20:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:20:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-09-24 23:20:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:41,438 INFO L225 Difference]: With dead ends: 285 [2024-09-24 23:20:41,438 INFO L226 Difference]: Without dead ends: 283 [2024-09-24 23:20:41,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-09-24 23:20:41,439 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:41,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:20:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-24 23:20:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-09-24 23:20:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-24 23:20:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-09-24 23:20:41,613 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-09-24 23:20:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:41,613 INFO L474 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-09-24 23:20:41,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-24 23:20:41,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-09-24 23:20:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-24 23:20:41,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:41,615 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:41,624 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-24 23:20:41,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:41,816 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:41,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-09-24 23:20:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:41,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875291465] [2024-09-24 23:20:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:41,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632758552] [2024-09-24 23:20:41,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:20:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:41,842 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) [2024-09-24 23:20:41,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 23:20:41,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:20:41,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:41,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-24 23:20:41,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-24 23:20:42,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-24 23:20:44,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:44,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875291465] [2024-09-24 23:20:44,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:44,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632758552] [2024-09-24 23:20:44,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632758552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:20:44,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:20:44,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-09-24 23:20:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928427260] [2024-09-24 23:20:44,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:44,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:20:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:20:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:20:44,019 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-24 23:20:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:49,537 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-09-24 23:20:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-24 23:20:49,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-09-24 23:20:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:49,540 INFO L225 Difference]: With dead ends: 414 [2024-09-24 23:20:49,541 INFO L226 Difference]: Without dead ends: 412 [2024-09-24 23:20:49,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-09-24 23:20:49,542 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:49,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-24 23:20:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-09-24 23:20:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-09-24 23:20:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-09-24 23:20:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-09-24 23:20:49,790 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-09-24 23:20:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:49,791 INFO L474 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-09-24 23:20:49,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-24 23:20:49,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-09-24 23:20:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-24 23:20:49,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:49,793 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-24 23:20:49,809 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-24 23:20:49,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:49,993 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-09-24 23:20:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:49,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39729534] [2024-09-24 23:20:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:50,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560836838] [2024-09-24 23:20:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:20:50,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:50,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:50,017 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) [2024-09-24 23:20:50,018 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:20:50,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:20:50,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:50,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-24 23:20:50,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-09-24 23:20:50,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:20:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-24 23:20:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:20:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39729534] [2024-09-24 23:20:51,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:20:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560836838] [2024-09-24 23:20:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560836838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:20:51,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:20:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-24 23:20:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744579070] [2024-09-24 23:20:51,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:20:51,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-24 23:20:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:20:51,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-24 23:20:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:20:51,109 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-24 23:20:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:20:54,313 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-09-24 23:20:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-24 23:20:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-09-24 23:20:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:20:54,315 INFO L225 Difference]: With dead ends: 415 [2024-09-24 23:20:54,315 INFO L226 Difference]: Without dead ends: 405 [2024-09-24 23:20:54,316 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-09-24 23:20:54,317 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:20:54,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-24 23:20:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-24 23:20:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-09-24 23:20:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-24 23:20:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-09-24 23:20:54,572 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-09-24 23:20:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:20:54,572 INFO L474 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-09-24 23:20:54,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-24 23:20:54,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-09-24 23:20:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-24 23:20:54,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:20:54,574 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:20:54,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-24 23:20:54,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:54,775 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:20:54,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:20:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-09-24 23:20:54,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:20:54,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511544356] [2024-09-24 23:20:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:20:54,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:20:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:20:54,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999507758] [2024-09-24 23:20:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:20:54,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:20:54,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:20:54,800 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) [2024-09-24 23:20:54,801 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:20:54,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-24 23:20:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:20:54,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-24 23:20:54,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:20:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-09-24 23:20:57,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:06,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:06,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511544356] [2024-09-24 23:21:06,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:06,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999507758] [2024-09-24 23:21:06,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999507758] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:21:06,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:21:06,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-24 23:21:06,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770938005] [2024-09-24 23:21:06,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:06,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:21:06,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:21:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2024-09-24 23:21:06,918 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:21:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:11,316 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-09-24 23:21:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:21:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-09-24 23:21:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:11,319 INFO L225 Difference]: With dead ends: 440 [2024-09-24 23:21:11,319 INFO L226 Difference]: Without dead ends: 438 [2024-09-24 23:21:11,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=181, Invalid=940, Unknown=1, NotChecked=0, Total=1122 [2024-09-24 23:21:11,321 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:11,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-24 23:21:11,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-24 23:21:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-09-24 23:21:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-24 23:21:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-09-24 23:21:11,625 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-09-24 23:21:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:11,625 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-09-24 23:21:11,625 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:21:11,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-09-24 23:21:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-24 23:21:11,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:11,627 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:11,635 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-24 23:21:11,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-24 23:21:11,832 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:11,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-09-24 23:21:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647823222] [2024-09-24 23:21:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:11,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813493707] [2024-09-24 23:21:11,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:21:11,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:11,852 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) [2024-09-24 23:21:11,855 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:21:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:21:11,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-24 23:21:11,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-24 23:21:13,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647823222] [2024-09-24 23:21:13,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813493707] [2024-09-24 23:21:13,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813493707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:21:13,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:21:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-24 23:21:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701741629] [2024-09-24 23:21:13,429 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:13,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:21:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:21:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:21:13,430 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-24 23:21:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:14,502 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-09-24 23:21:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:21:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-09-24 23:21:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:14,506 INFO L225 Difference]: With dead ends: 466 [2024-09-24 23:21:14,506 INFO L226 Difference]: Without dead ends: 464 [2024-09-24 23:21:14,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:21:14,507 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:14,507 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:21:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-09-24 23:21:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-09-24 23:21:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:21:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-09-24 23:21:14,817 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-09-24 23:21:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:14,817 INFO L474 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-09-24 23:21:14,817 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-09-24 23:21:14,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-09-24 23:21:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-24 23:21:14,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:14,819 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:14,834 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-24 23:21:15,023 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-24 23:21:15,024 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:15,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-09-24 23:21:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176815202] [2024-09-24 23:21:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:15,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505785916] [2024-09-24 23:21:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:21:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:15,050 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) [2024-09-24 23:21:15,051 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:21:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:21:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:21:15,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-24 23:21:15,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-24 23:21:16,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:36,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176815202] [2024-09-24 23:21:36,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:36,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505785916] [2024-09-24 23:21:36,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505785916] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:21:36,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:21:36,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-24 23:21:36,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868591343] [2024-09-24 23:21:36,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:36,874 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:21:36,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:21:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=560, Unknown=2, NotChecked=0, Total=702 [2024-09-24 23:21:36,875 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-24 23:21:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:38,019 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-09-24 23:21:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:21:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-09-24 23:21:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:38,023 INFO L225 Difference]: With dead ends: 472 [2024-09-24 23:21:38,023 INFO L226 Difference]: Without dead ends: 470 [2024-09-24 23:21:38,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=243, Invalid=945, Unknown=2, NotChecked=0, Total=1190 [2024-09-24 23:21:38,024 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:38,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:21:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-09-24 23:21:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-09-24 23:21:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:21:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-09-24 23:21:38,403 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-09-24 23:21:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:38,403 INFO L474 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-09-24 23:21:38,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-24 23:21:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-09-24 23:21:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-24 23:21:38,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:38,406 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:38,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-24 23:21:38,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:38,606 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:38,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-09-24 23:21:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:38,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175668273] [2024-09-24 23:21:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:38,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206768261] [2024-09-24 23:21:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:21:38,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:38,628 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) [2024-09-24 23:21:38,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-24 23:21:38,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:21:38,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:21:38,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-24 23:21:38,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-09-24 23:21:42,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175668273] [2024-09-24 23:21:42,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206768261] [2024-09-24 23:21:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206768261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:21:42,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:21:42,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-24 23:21:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888643450] [2024-09-24 23:21:42,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:42,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:21:42,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:21:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:21:42,251 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:21:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:43,841 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-09-24 23:21:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:21:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-09-24 23:21:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:43,844 INFO L225 Difference]: With dead ends: 486 [2024-09-24 23:21:43,844 INFO L226 Difference]: Without dead ends: 484 [2024-09-24 23:21:43,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:21:43,845 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:43,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-24 23:21:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-24 23:21:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-09-24 23:21:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:21:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-09-24 23:21:44,230 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-09-24 23:21:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:44,230 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-09-24 23:21:44,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:21:44,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-09-24 23:21:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-24 23:21:44,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:44,231 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:44,245 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-24 23:21:44,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:21:44,432 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:44,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-09-24 23:21:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:44,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271605199] [2024-09-24 23:21:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:44,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169602420] [2024-09-24 23:21:44,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:21:44,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:44,454 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) [2024-09-24 23:21:44,455 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-24 23:21:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:21:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:21:44,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:21:44,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-09-24 23:21:45,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271605199] [2024-09-24 23:21:50,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:50,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169602420] [2024-09-24 23:21:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169602420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:21:50,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:21:50,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-24 23:21:50,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058838975] [2024-09-24 23:21:50,335 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:50,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:21:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:21:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-24 23:21:50,336 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-24 23:21:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:51,052 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-09-24 23:21:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:21:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-09-24 23:21:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:51,056 INFO L225 Difference]: With dead ends: 488 [2024-09-24 23:21:51,056 INFO L226 Difference]: Without dead ends: 481 [2024-09-24 23:21:51,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-24 23:21:51,057 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:51,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:21:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-24 23:21:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-09-24 23:21:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:21:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-09-24 23:21:51,389 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-09-24 23:21:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:51,389 INFO L474 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-09-24 23:21:51,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-24 23:21:51,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-09-24 23:21:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-09-24 23:21:51,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:51,393 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:51,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-24 23:21:51,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-24 23:21:51,597 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:51,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-09-24 23:21:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:51,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205823556] [2024-09-24 23:21:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:51,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:51,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921104036] [2024-09-24 23:21:51,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:21:51,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:51,624 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) [2024-09-24 23:21:51,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-24 23:21:51,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:21:51,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:21:51,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-24 23:21:51,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-09-24 23:21:52,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-09-24 23:21:52,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:52,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205823556] [2024-09-24 23:21:52,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:52,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921104036] [2024-09-24 23:21:52,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921104036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:21:52,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:21:52,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-09-24 23:21:52,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002798806] [2024-09-24 23:21:52,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:52,525 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:21:52,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:21:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:21:52,525 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-24 23:21:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:55,520 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-09-24 23:21:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-24 23:21:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-09-24 23:21:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:55,523 INFO L225 Difference]: With dead ends: 501 [2024-09-24 23:21:55,523 INFO L226 Difference]: Without dead ends: 499 [2024-09-24 23:21:55,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-09-24 23:21:55,524 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:55,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-24 23:21:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-24 23:21:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-09-24 23:21:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:21:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-09-24 23:21:55,888 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-09-24 23:21:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:21:55,889 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-09-24 23:21:55,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-24 23:21:55,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-09-24 23:21:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-24 23:21:55,890 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:21:55,890 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:21:55,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-24 23:21:56,091 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-24 23:21:56,091 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:21:56,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:21:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-09-24 23:21:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:21:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607426556] [2024-09-24 23:21:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:21:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:21:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:21:56,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146298379] [2024-09-24 23:21:56,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:21:56,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:21:56,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:21:56,121 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) [2024-09-24 23:21:56,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-24 23:21:56,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-24 23:21:56,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:21:56,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-24 23:21:56,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:21:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-24 23:21:57,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:21:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-09-24 23:21:57,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:21:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607426556] [2024-09-24 23:21:57,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:21:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146298379] [2024-09-24 23:21:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146298379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:21:57,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:21:57,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-09-24 23:21:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581108553] [2024-09-24 23:21:57,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:21:57,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-24 23:21:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:21:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-24 23:21:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:21:57,832 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-24 23:21:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:21:59,642 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-09-24 23:21:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:21:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-09-24 23:21:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:21:59,645 INFO L225 Difference]: With dead ends: 523 [2024-09-24 23:21:59,645 INFO L226 Difference]: Without dead ends: 521 [2024-09-24 23:21:59,646 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-09-24 23:21:59,646 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:21:59,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-24 23:21:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-24 23:22:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-09-24 23:22:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:22:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-09-24 23:22:00,098 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-09-24 23:22:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:22:00,098 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-09-24 23:22:00,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-09-24 23:22:00,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-09-24 23:22:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-09-24 23:22:00,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:22:00,101 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:22:00,109 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-24 23:22:00,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-24 23:22:00,301 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:22:00,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:00,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-09-24 23:22:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:22:00,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396728146] [2024-09-24 23:22:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:22:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:22:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:22:00,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454168435] [2024-09-24 23:22:00,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:22:00,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:22:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:22:00,340 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) [2024-09-24 23:22:00,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-24 23:22:00,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-24 23:22:00,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:22:00,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-24 23:22:00,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:22:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-09-24 23:22:01,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:22:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:22:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396728146] [2024-09-24 23:22:01,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:22:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454168435] [2024-09-24 23:22:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454168435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:22:01,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:22:01,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-24 23:22:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26961044] [2024-09-24 23:22:01,311 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:22:01,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:22:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:22:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:22:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:22:01,312 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-24 23:22:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:22:02,131 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-09-24 23:22:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:22:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-09-24 23:22:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:22:02,134 INFO L225 Difference]: With dead ends: 502 [2024-09-24 23:22:02,134 INFO L226 Difference]: Without dead ends: 500 [2024-09-24 23:22:02,134 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:22:02,134 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:22:02,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:22:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-09-24 23:22:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-09-24 23:22:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-24 23:22:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-09-24 23:22:02,634 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-09-24 23:22:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:22:02,634 INFO L474 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-09-24 23:22:02,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-09-24 23:22:02,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-09-24 23:22:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-24 23:22:02,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:22:02,636 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:22:02,644 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-24 23:22:02,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:22:02,837 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:22:02,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-09-24 23:22:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:22:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403011954] [2024-09-24 23:22:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:22:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:22:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:22:02,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117020173] [2024-09-24 23:22:02,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:22:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:22:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:22:02,863 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) [2024-09-24 23:22:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-24 23:22:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:22:02,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-24 23:22:02,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:22:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-09-24 23:22:04,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:22:25,021 WARN L293 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:22:56,845 WARN L293 SmtUtils]: Spent 13.33s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:22:56,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:22:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403011954] [2024-09-24 23:22:56,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:22:56,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117020173] [2024-09-24 23:22:56,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117020173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:22:56,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:22:56,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-24 23:22:56,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600143936] [2024-09-24 23:22:56,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:22:56,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:22:56,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:22:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:22:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=932, Unknown=2, NotChecked=0, Total=1122 [2024-09-24 23:22:56,848 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-24 23:22:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:22:58,222 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-09-24 23:22:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-24 23:22:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-24 23:22:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:22:58,225 INFO L225 Difference]: With dead ends: 483 [2024-09-24 23:22:58,225 INFO L226 Difference]: Without dead ends: 481 [2024-09-24 23:22:58,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=294, Invalid=1426, Unknown=2, NotChecked=0, Total=1722 [2024-09-24 23:22:58,226 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:22:58,226 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:22:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-09-24 23:22:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-09-24 23:22:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-24 23:22:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-09-24 23:22:58,696 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-09-24 23:22:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:22:58,697 INFO L474 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-09-24 23:22:58,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-24 23:22:58,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-09-24 23:22:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-24 23:22:58,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:22:58,699 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:22:58,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-24 23:22:58,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-24 23:22:58,901 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:22:58,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:22:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-09-24 23:22:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:22:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389238583] [2024-09-24 23:22:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:22:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:22:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:22:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037710909] [2024-09-24 23:22:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:22:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:22:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:22:58,939 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) [2024-09-24 23:22:58,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-24 23:22:59,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:22:59,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:22:59,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-24 23:22:59,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:23:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-09-24 23:23:07,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:23:08,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:23:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389238583] [2024-09-24 23:23:08,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:23:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037710909] [2024-09-24 23:23:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037710909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:23:08,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:23:08,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-24 23:23:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319921478] [2024-09-24 23:23:08,102 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:23:08,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:23:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:23:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:23:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:23:08,103 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-24 23:23:17,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-24 23:23:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:23:19,226 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-09-24 23:23:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:23:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-09-24 23:23:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:23:19,229 INFO L225 Difference]: With dead ends: 526 [2024-09-24 23:23:19,230 INFO L226 Difference]: Without dead ends: 524 [2024-09-24 23:23:19,230 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-09-24 23:23:19,230 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:23:19,231 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2024-09-24 23:23:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-09-24 23:23:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-09-24 23:23:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-24 23:23:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-09-24 23:23:19,705 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-09-24 23:23:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:23:19,705 INFO L474 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-09-24 23:23:19,706 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-24 23:23:19,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-09-24 23:23:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-09-24 23:23:19,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:23:19,708 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:23:19,723 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-24 23:23:19,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:23:19,909 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:23:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-09-24 23:23:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:23:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813167397] [2024-09-24 23:23:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:23:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:23:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:23:19,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245954111] [2024-09-24 23:23:19,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:23:19,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:23:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:23:19,940 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) [2024-09-24 23:23:19,942 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-24 23:23:20,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:23:20,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:23:20,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-24 23:23:20,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:23:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-09-24 23:23:22,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:23:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:23:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813167397] [2024-09-24 23:23:22,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:23:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245954111] [2024-09-24 23:23:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245954111] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:23:22,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:23:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-24 23:23:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910516866] [2024-09-24 23:23:22,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:23:22,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:23:22,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:23:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:23:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:23:22,436 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:23:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:23:25,091 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-09-24 23:23:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-24 23:23:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-09-24 23:23:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:23:25,095 INFO L225 Difference]: With dead ends: 574 [2024-09-24 23:23:25,095 INFO L226 Difference]: Without dead ends: 572 [2024-09-24 23:23:25,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-24 23:23:25,096 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:23:25,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:23:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-24 23:23:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-09-24 23:23:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-24 23:23:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-09-24 23:23:25,562 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-09-24 23:23:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:23:25,562 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-09-24 23:23:25,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-24 23:23:25,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-09-24 23:23:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-24 23:23:25,564 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:23:25,564 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:23:25,582 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-24 23:23:25,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:23:25,765 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:23:25,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:25,765 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-09-24 23:23:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:23:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674768892] [2024-09-24 23:23:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:23:25,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:23:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:23:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071952138] [2024-09-24 23:23:25,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:23:25,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:23:25,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:23:25,786 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) [2024-09-24 23:23:25,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-24 23:23:25,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:23:25,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:23:25,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-24 23:23:25,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:23:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-24 23:23:27,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:23:32,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:23:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674768892] [2024-09-24 23:23:32,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:23:32,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071952138] [2024-09-24 23:23:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071952138] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:23:32,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:23:32,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-24 23:23:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177529018] [2024-09-24 23:23:32,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:23:32,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:23:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:23:32,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:23:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:23:32,568 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-24 23:23:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:23:34,501 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-09-24 23:23:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-24 23:23:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-09-24 23:23:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:23:34,505 INFO L225 Difference]: With dead ends: 628 [2024-09-24 23:23:34,505 INFO L226 Difference]: Without dead ends: 621 [2024-09-24 23:23:34,506 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-09-24 23:23:34,506 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:23:34,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:23:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-09-24 23:23:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-09-24 23:23:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-09-24 23:23:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-09-24 23:23:34,991 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-09-24 23:23:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:23:34,992 INFO L474 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-09-24 23:23:34,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-24 23:23:34,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-09-24 23:23:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-09-24 23:23:34,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:23:34,994 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:23:35,007 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-24 23:23:35,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-24 23:23:35,197 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:23:35,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:23:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-09-24 23:23:35,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:23:35,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137769844] [2024-09-24 23:23:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:23:35,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:23:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:23:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455425993] [2024-09-24 23:23:35,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:23:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:23:35,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:23:35,217 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) [2024-09-24 23:23:35,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-24 23:23:35,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-24 23:23:35,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:23:35,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-24 23:23:35,352 INFO L285 TraceCheckSpWp]: Computing forward predicates...