./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.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 e378df2c 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/loop-invariants/linear-inequality-inv-a.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 d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:31:04,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:31:04,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:31:04,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:31:04,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:31:04,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:31:04,138 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:31:04,138 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:31:04,138 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:31:04,140 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:31:04,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:31:04,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:31:04,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:31:04,143 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:31:04,143 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:31:04,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:31:04,144 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:31:04,144 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:31:04,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:31:04,144 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:31:04,144 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:31:04,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:31:04,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:31:04,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:31:04,148 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:31:04,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:31:04,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:31:04,148 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:31:04,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:31:04,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:31:04,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:31:04,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:31:04,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:31:04,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:31:04,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:31:04,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:31:04,151 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:31:04,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:31:04,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:31:04,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:31:04,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:31:04,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:31:04,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2b9c65bc0d5e6814219e058019ca5895f861b5993bd9ff39cc6b3d5fb3e6a41 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:31:04,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:31:04,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:31:04,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:31:04,418 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:31:04,418 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:31:04,420 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-10-15 14:31:05,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:31:06,017 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:31:06,018 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2024-10-15 14:31:06,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8673d209d/e65b07150ce74501bc3424e7b864a46f/FLAGc36600a76 [2024-10-15 14:31:06,423 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8673d209d/e65b07150ce74501bc3424e7b864a46f [2024-10-15 14:31:06,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:31:06,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:31:06,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:31:06,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:31:06,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:31:06,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf629f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06, skipping insertion in model container [2024-10-15 14:31:06,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,458 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:31:06,613 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/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-10-15 14:31:06,617 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/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-10-15 14:31:06,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:31:06,626 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:31:06,637 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/loop-invariants/linear-inequality-inv-a.c[860,873] [2024-10-15 14:31:06,638 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/loop-invariants/linear-inequality-inv-a.c[916,929] [2024-10-15 14:31:06,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:31:06,653 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:31:06,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06 WrapperNode [2024-10-15 14:31:06,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:31:06,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:31:06,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:31:06,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:31:06,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,666 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,671 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:31:06,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:31:06,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:31:06,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:31:06,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:31:06,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,683 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,693 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]. [2024-10-15 14:31:06,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,722 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:31:06,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:31:06,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:31:06,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:31:06,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (1/1) ... [2024-10-15 14:31:06,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:31:06,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:06,783 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) [2024-10-15 14:31:06,785 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 [2024-10-15 14:31:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:31:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:31:06,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:31:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:31:06,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:31:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:31:06,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:31:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:31:06,892 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:31:06,897 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:31:07,048 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-15 14:31:07,048 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:31:07,074 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:31:07,074 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-15 14:31:07,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:31:07 BoogieIcfgContainer [2024-10-15 14:31:07,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:31:07,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:31:07,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:31:07,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:31:07,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:31:06" (1/3) ... [2024-10-15 14:31:07,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0cd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:31:07, skipping insertion in model container [2024-10-15 14:31:07,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:31:06" (2/3) ... [2024-10-15 14:31:07,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac0cd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:31:07, skipping insertion in model container [2024-10-15 14:31:07,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:31:07" (3/3) ... [2024-10-15 14:31:07,088 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2024-10-15 14:31:07,102 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:31:07,102 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-15 14:31:07,147 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:31:07,153 INFO L333 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;@7af13b30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:31:07,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-15 14:31:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-15 14:31:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-15 14:31:07,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:07,162 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:07,163 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:07,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:07,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1128209337, now seen corresponding path program 1 times [2024-10-15 14:31:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:07,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436783557] [2024-10-15 14:31:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:07,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:07,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436783557] [2024-10-15 14:31:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436783557] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:31:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:31:07,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:31:07,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130946651] [2024-10-15 14:31:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:31:07,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:31:07,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:31:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:31:07,475 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:07,508 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-10-15 14:31:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:31:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-10-15 14:31:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:07,519 INFO L225 Difference]: With dead ends: 28 [2024-10-15 14:31:07,520 INFO L226 Difference]: Without dead ends: 14 [2024-10-15 14:31:07,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:31:07,525 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:07,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-15 14:31:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-15 14:31:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2024-10-15 14:31:07,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2024-10-15 14:31:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:07,559 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2024-10-15 14:31:07,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:07,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2024-10-15 14:31:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-15 14:31:07,561 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:07,561 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:07,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:31:07,562 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:07,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash -614699191, now seen corresponding path program 1 times [2024-10-15 14:31:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:07,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789438143] [2024-10-15 14:31:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789438143] [2024-10-15 14:31:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789438143] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877119600] [2024-10-15 14:31:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:07,781 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) [2024-10-15 14:31:07,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:31:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-15 14:31:07,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:07,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877119600] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-15 14:31:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982872199] [2024-10-15 14:31:08,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:08,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:31:08,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:31:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:31:08,110 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:08,192 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-10-15 14:31:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:31:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-10-15 14:31:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:08,196 INFO L225 Difference]: With dead ends: 23 [2024-10-15 14:31:08,196 INFO L226 Difference]: Without dead ends: 21 [2024-10-15 14:31:08,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:31:08,198 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:08,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-15 14:31:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-10-15 14:31:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-15 14:31:08,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2024-10-15 14:31:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:08,206 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-15 14:31:08,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-15 14:31:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-15 14:31:08,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:08,207 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:08,228 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:08,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:08,412 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:08,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1875802668, now seen corresponding path program 1 times [2024-10-15 14:31:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:08,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580472708] [2024-10-15 14:31:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:08,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:08,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:08,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580472708] [2024-10-15 14:31:08,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580472708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005068804] [2024-10-15 14:31:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:08,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:08,522 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) [2024-10-15 14:31:08,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:31:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:08,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-15 14:31:08,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:08,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:08,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005068804] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:08,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:08,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-15 14:31:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185107489] [2024-10-15 14:31:08,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:08,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:31:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:31:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:31:08,701 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:08,738 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-10-15 14:31:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:31:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-15 14:31:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:08,740 INFO L225 Difference]: With dead ends: 25 [2024-10-15 14:31:08,740 INFO L226 Difference]: Without dead ends: 17 [2024-10-15 14:31:08,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:31:08,741 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:08,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-15 14:31:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-15 14:31:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2024-10-15 14:31:08,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2024-10-15 14:31:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:08,752 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2024-10-15 14:31:08,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:08,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2024-10-15 14:31:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 14:31:08,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:08,753 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:08,768 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:08,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:08,955 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:08,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1288475847, now seen corresponding path program 2 times [2024-10-15 14:31:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500227053] [2024-10-15 14:31:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500227053] [2024-10-15 14:31:09,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500227053] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:09,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135706806] [2024-10-15 14:31:09,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:09,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:09,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:09,178 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) [2024-10-15 14:31:09,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:31:09,225 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:09,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:09,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:31:09,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:09,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135706806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:09,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:09,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-15 14:31:09,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879118685] [2024-10-15 14:31:09,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:09,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 14:31:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 14:31:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:31:09,532 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:09,709 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-10-15 14:31:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:31:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-15 14:31:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:09,713 INFO L225 Difference]: With dead ends: 35 [2024-10-15 14:31:09,713 INFO L226 Difference]: Without dead ends: 33 [2024-10-15 14:31:09,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:31:09,715 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:09,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-15 14:31:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2024-10-15 14:31:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-15 14:31:09,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 13 [2024-10-15 14:31:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:09,729 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-15 14:31:09,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:09,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-15 14:31:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-15 14:31:09,730 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:09,731 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:09,748 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:31:09,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:09,932 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:09,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1288048662, now seen corresponding path program 2 times [2024-10-15 14:31:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:09,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533439670] [2024-10-15 14:31:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:10,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:10,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:10,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533439670] [2024-10-15 14:31:10,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533439670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:10,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662782222] [2024-10-15 14:31:10,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:10,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:10,123 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) [2024-10-15 14:31:10,129 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:31:10,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:10,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:10,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:31:10,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:10,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:10,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662782222] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:10,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:10,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-15 14:31:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178673031] [2024-10-15 14:31:10,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:10,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:31:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:31:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:31:10,388 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:10,439 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-10-15 14:31:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:31:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-15 14:31:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:10,441 INFO L225 Difference]: With dead ends: 37 [2024-10-15 14:31:10,441 INFO L226 Difference]: Without dead ends: 23 [2024-10-15 14:31:10,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:31:10,442 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:10,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:10,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-15 14:31:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-15 14:31:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-10-15 14:31:10,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-10-15 14:31:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:10,451 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-10-15 14:31:10,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:10,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-10-15 14:31:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-15 14:31:10,453 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:10,453 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:10,470 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:10,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:10,658 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:10,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash 599336327, now seen corresponding path program 3 times [2024-10-15 14:31:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:10,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274260200] [2024-10-15 14:31:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274260200] [2024-10-15 14:31:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274260200] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162568546] [2024-10-15 14:31:11,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:11,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:11,026 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) [2024-10-15 14:31:11,028 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:31:11,099 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:31:11,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:11,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-15 14:31:11,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:11,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162568546] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:11,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-15 14:31:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240472539] [2024-10-15 14:31:11,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:11,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:31:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:31:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:31:11,880 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:12,435 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2024-10-15 14:31:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-15 14:31:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-15 14:31:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:12,438 INFO L225 Difference]: With dead ends: 59 [2024-10-15 14:31:12,439 INFO L226 Difference]: Without dead ends: 57 [2024-10-15 14:31:12,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2024-10-15 14:31:12,440 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:12,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 77 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-15 14:31:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2024-10-15 14:31:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2024-10-15 14:31:12,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 19 [2024-10-15 14:31:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:12,455 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2024-10-15 14:31:12,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:12,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2024-10-15 14:31:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-15 14:31:12,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:12,456 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:12,474 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:31:12,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:31:12,657 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:12,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1399560022, now seen corresponding path program 3 times [2024-10-15 14:31:12,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:12,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343009923] [2024-10-15 14:31:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:12,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343009923] [2024-10-15 14:31:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343009923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126940469] [2024-10-15 14:31:13,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:13,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:13,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:13,037 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) [2024-10-15 14:31:13,038 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:31:13,123 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:31:13,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:13,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-15 14:31:13,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:13,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126940469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:13,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-10-15 14:31:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661349977] [2024-10-15 14:31:13,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:13,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:31:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:31:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:31:13,627 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:13,703 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-10-15 14:31:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:31:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-10-15 14:31:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:13,704 INFO L225 Difference]: With dead ends: 61 [2024-10-15 14:31:13,704 INFO L226 Difference]: Without dead ends: 35 [2024-10-15 14:31:13,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:31:13,705 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:13,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-15 14:31:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-15 14:31:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2024-10-15 14:31:13,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 20 [2024-10-15 14:31:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:13,713 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2024-10-15 14:31:13,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:13,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2024-10-15 14:31:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 14:31:13,714 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:13,714 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:13,731 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:31:13,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:13,919 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:13,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1300261113, now seen corresponding path program 4 times [2024-10-15 14:31:13,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:13,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446967623] [2024-10-15 14:31:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446967623] [2024-10-15 14:31:15,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446967623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792721997] [2024-10-15 14:31:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:31:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:15,037 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) [2024-10-15 14:31:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:31:15,095 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:31:15,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:15,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:31:15,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:15,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:17,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792721997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:17,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:17,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-10-15 14:31:17,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100847278] [2024-10-15 14:31:17,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:17,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-15 14:31:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-15 14:31:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2024-10-15 14:31:17,029 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:18,349 INFO L93 Difference]: Finished difference Result 107 states and 154 transitions. [2024-10-15 14:31:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-10-15 14:31:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-10-15 14:31:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:18,350 INFO L225 Difference]: With dead ends: 107 [2024-10-15 14:31:18,351 INFO L226 Difference]: Without dead ends: 105 [2024-10-15 14:31:18,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2024-10-15 14:31:18,354 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:18,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 84 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:31:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-15 14:31:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2024-10-15 14:31:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 56 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2024-10-15 14:31:18,364 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 31 [2024-10-15 14:31:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:18,364 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2024-10-15 14:31:18,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:18,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2024-10-15 14:31:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:31:18,365 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:18,365 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:18,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:31:18,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:18,570 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:18,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1653385770, now seen corresponding path program 4 times [2024-10-15 14:31:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:18,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017315775] [2024-10-15 14:31:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:18,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:19,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:19,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017315775] [2024-10-15 14:31:19,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017315775] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:19,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049422179] [2024-10-15 14:31:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:31:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:19,430 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) [2024-10-15 14:31:19,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:31:20,028 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:31:20,028 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:20,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:31:20,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:20,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049422179] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:21,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:21,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-10-15 14:31:21,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243754236] [2024-10-15 14:31:21,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:21,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:31:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:31:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:21,238 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:21,399 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-10-15 14:31:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-15 14:31:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-10-15 14:31:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:21,403 INFO L225 Difference]: With dead ends: 109 [2024-10-15 14:31:21,403 INFO L226 Difference]: Without dead ends: 59 [2024-10-15 14:31:21,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:21,406 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:21,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 71 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-15 14:31:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-15 14:31:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2024-10-15 14:31:21,425 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 32 [2024-10-15 14:31:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:21,426 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2024-10-15 14:31:21,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:21,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2024-10-15 14:31:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:31:21,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:21,428 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:21,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:21,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:21,629 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:21,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -426657273, now seen corresponding path program 5 times [2024-10-15 14:31:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:21,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354277647] [2024-10-15 14:31:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:24,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354277647] [2024-10-15 14:31:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354277647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66634590] [2024-10-15 14:31:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:24,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:24,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:24,313 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) [2024-10-15 14:31:24,314 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:31:25,782 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-15 14:31:25,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:25,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-10-15 14:31:25,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:26,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66634590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:29,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:29,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-10-15 14:31:29,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136588257] [2024-10-15 14:31:29,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:29,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-10-15 14:31:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:29,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-10-15 14:31:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4426, Invalid=4886, Unknown=0, NotChecked=0, Total=9312 [2024-10-15 14:31:29,304 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:32,735 INFO L93 Difference]: Finished difference Result 203 states and 298 transitions. [2024-10-15 14:31:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-10-15 14:31:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-10-15 14:31:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:32,737 INFO L225 Difference]: With dead ends: 203 [2024-10-15 14:31:32,737 INFO L226 Difference]: Without dead ends: 201 [2024-10-15 14:31:32,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=13350, Invalid=22182, Unknown=0, NotChecked=0, Total=35532 [2024-10-15 14:31:32,744 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 254 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:32,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 127 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:31:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-15 14:31:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 108. [2024-10-15 14:31:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 104 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2024-10-15 14:31:32,760 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 55 [2024-10-15 14:31:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:32,761 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2024-10-15 14:31:32,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:32,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2024-10-15 14:31:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:31:32,763 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:32,763 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:32,776 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:31:32,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 14:31:32,964 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:32,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash -341470506, now seen corresponding path program 5 times [2024-10-15 14:31:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:32,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063393530] [2024-10-15 14:31:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:35,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:35,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063393530] [2024-10-15 14:31:35,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063393530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:35,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066608147] [2024-10-15 14:31:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:35,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:35,654 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) [2024-10-15 14:31:35,655 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:31:37,087 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-15 14:31:37,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:37,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-10-15 14:31:37,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:37,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:40,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066608147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:40,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:40,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-10-15 14:31:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387054232] [2024-10-15 14:31:40,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:40,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-10-15 14:31:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:40,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-10-15 14:31:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-10-15 14:31:40,525 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:40,848 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2024-10-15 14:31:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-10-15 14:31:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-10-15 14:31:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:40,850 INFO L225 Difference]: With dead ends: 205 [2024-10-15 14:31:40,850 INFO L226 Difference]: Without dead ends: 107 [2024-10-15 14:31:40,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-10-15 14:31:40,851 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 328 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:40,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 92 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:31:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-15 14:31:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-10-15 14:31:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 103 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2024-10-15 14:31:40,864 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 56 [2024-10-15 14:31:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:40,864 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2024-10-15 14:31:40,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:31:40,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2024-10-15 14:31:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-15 14:31:40,866 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:40,866 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:40,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 14:31:41,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 14:31:41,067 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:41,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash -146079737, now seen corresponding path program 6 times [2024-10-15 14:31:41,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:41,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791910500] [2024-10-15 14:31:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791910500] [2024-10-15 14:31:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791910500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513888771] [2024-10-15 14:31:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:31:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:50,084 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) [2024-10-15 14:31:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:31:54,575 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-10-15 14:31:54,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:54,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-10-15 14:31:54,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:31:54,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:32:07,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513888771] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:07,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:07,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-10-15 14:32:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516843444] [2024-10-15 14:32:07,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:07,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-10-15 14:32:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-10-15 14:32:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18058, Invalid=18998, Unknown=0, NotChecked=0, Total=37056 [2024-10-15 14:32:07,074 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:19,768 INFO L93 Difference]: Finished difference Result 395 states and 586 transitions. [2024-10-15 14:32:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-10-15 14:32:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2024-10-15 14:32:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:19,771 INFO L225 Difference]: With dead ends: 395 [2024-10-15 14:32:19,772 INFO L226 Difference]: Without dead ends: 393 [2024-10-15 14:32:19,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31161 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=54342, Invalid=90438, Unknown=0, NotChecked=0, Total=144780 [2024-10-15 14:32:19,781 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 815 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:19,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 151 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:32:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-10-15 14:32:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 204. [2024-10-15 14:32:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.4924623115577889) internal successors, (297), 200 states have internal predecessors, (297), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 300 transitions. [2024-10-15 14:32:19,814 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 300 transitions. Word has length 103 [2024-10-15 14:32:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:19,815 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 300 transitions. [2024-10-15 14:32:19,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:19,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 300 transitions. [2024-10-15 14:32:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-15 14:32:19,817 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:19,817 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:19,831 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 14:32:20,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:20,018 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:20,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash -233501482, now seen corresponding path program 6 times [2024-10-15 14:32:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488747724] [2024-10-15 14:32:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:28,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:32:28,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488747724] [2024-10-15 14:32:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488747724] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605946447] [2024-10-15 14:32:28,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:32:28,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:28,415 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) [2024-10-15 14:32:28,416 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:32:37,071 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-10-15 14:32:37,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:37,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-10-15 14:32:37,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:32:37,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:32:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605946447] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:49,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 192 [2024-10-15 14:32:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175820665] [2024-10-15 14:32:49,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:49,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2024-10-15 14:32:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2024-10-15 14:32:49,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-10-15 14:32:49,556 INFO L87 Difference]: Start difference. First operand 204 states and 300 transitions. Second operand has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:50,853 INFO L93 Difference]: Finished difference Result 397 states and 492 transitions. [2024-10-15 14:32:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-10-15 14:32:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2024-10-15 14:32:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:50,855 INFO L225 Difference]: With dead ends: 397 [2024-10-15 14:32:50,855 INFO L226 Difference]: Without dead ends: 203 [2024-10-15 14:32:50,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2024-10-15 14:32:50,858 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 754 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:50,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 151 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:32:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-15 14:32:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-10-15 14:32:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 199 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2024-10-15 14:32:50,873 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 104 [2024-10-15 14:32:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:50,873 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2024-10-15 14:32:50,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:32:50,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2024-10-15 14:32:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-10-15 14:32:50,875 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:50,876 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:50,889 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:51,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:32:51,076 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:51,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1357804537, now seen corresponding path program 7 times [2024-10-15 14:32:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787995500] [2024-10-15 14:32:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:27,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:33:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787995500] [2024-10-15 14:33:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787995500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051061408] [2024-10-15 14:33:27,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:33:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:27,239 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) [2024-10-15 14:33:27,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:33:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:28,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 383 conjuncts are in the unsatisfiable core [2024-10-15 14:33:28,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:33:29,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:34:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051061408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:15,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:34:15,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-10-15 14:34:15,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672850151] [2024-10-15 14:34:15,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:15,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-10-15 14:34:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-10-15 14:34:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72970, Invalid=74870, Unknown=0, NotChecked=0, Total=147840 [2024-10-15 14:34:15,763 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 385 states have internal predecessors, (392), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)