./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:33:35,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:33:35,593 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:33:35,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:33:35,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:33:35,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:33:35,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:33:35,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:33:35,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:33:35,630 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:33:35,630 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:33:35,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:33:35,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:33:35,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:33:35,631 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:33:35,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:33:35,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:33:35,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:33:35,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:33:35,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:33:35,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:33:35,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:33:35,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:33:35,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:33:35,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:33:35,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:33:35,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:33:35,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:33:35,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:33:35,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:33:35,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:33:35,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:33:35,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:33:35,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:33:35,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:33:35,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:33:35,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:33:35,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:33:35,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:33:35,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:33:35,639 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:33:35,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:33:35,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:33:35,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:33:35,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:33:35,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:33:35,870 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:33:35,875 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:33:35,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-20 12:33:37,219 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:33:37,369 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:33:37,370 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-20 12:33:37,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2e8aab3ee/df1ebacec038410284ec396895a6e595/FLAG8ecbb057a [2024-09-20 12:33:37,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2e8aab3ee/df1ebacec038410284ec396895a6e595 [2024-09-20 12:33:37,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:33:37,390 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:33:37,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:33:37,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:33:37,395 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:33:37,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9b3107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37, skipping insertion in model container [2024-09-20 12:33:37,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,412 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:33:37,523 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-09-20 12:33:37,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:33:37,556 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:33:37,565 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-09-20 12:33:37,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:33:37,588 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:33:37,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37 WrapperNode [2024-09-20 12:33:37,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:33:37,590 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:33:37,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:33:37,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:33:37,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,607 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:33:37,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:33:37,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:33:37,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:33:37,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:33:37,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,618 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,638 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 12:33:37,638 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,641 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:33:37,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:33:37,651 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:33:37,651 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:33:37,652 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (1/1) ... [2024-09-20 12:33:37,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:33:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:37,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 12:33:37,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 12:33:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:33:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:33:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:33:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:33:37,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:33:37,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:33:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:33:37,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:33:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:33:37,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:33:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:33:37,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:33:37,838 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:33:37,840 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:33:37,957 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:33:37,957 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:33:37,972 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:33:37,972 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 12:33:37,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:33:37 BoogieIcfgContainer [2024-09-20 12:33:37,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:33:37,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:33:37,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:33:37,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:33:37,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:33:37" (1/3) ... [2024-09-20 12:33:37,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519a3042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:33:37, skipping insertion in model container [2024-09-20 12:33:37,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:33:37" (2/3) ... [2024-09-20 12:33:37,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519a3042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:33:37, skipping insertion in model container [2024-09-20 12:33:37,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:33:37" (3/3) ... [2024-09-20 12:33:37,979 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-09-20 12:33:37,993 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:33:37,993 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:33:38,033 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:33:38,039 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73c0a5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:33:38,039 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:33:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 12:33:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 12:33:38,051 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:38,051 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:38,052 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:38,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-20 12:33:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:38,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794795988] [2024-09-20 12:33:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794795988] [2024-09-20 12:33:38,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794795988] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:38,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:33:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877136304] [2024-09-20 12:33:38,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:38,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:33:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:33:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:33:38,283 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:38,307 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-20 12:33:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:33:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 12:33:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:38,316 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:33:38,316 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 12:33:38,319 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:33:38,321 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:38,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 12:33:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 12:33:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:33:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-20 12:33:38,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-20 12:33:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:38,355 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-20 12:33:38,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:38,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-20 12:33:38,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:33:38,360 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:38,360 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:38,360 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:33:38,360 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:38,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-20 12:33:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:38,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907822964] [2024-09-20 12:33:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907822964] [2024-09-20 12:33:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907822964] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:38,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 12:33:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521113021] [2024-09-20 12:33:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:38,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:33:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:33:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:38,570 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:38,652 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-20 12:33:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:33:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-20 12:33:38,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:38,654 INFO L225 Difference]: With dead ends: 53 [2024-09-20 12:33:38,654 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 12:33:38,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:38,655 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:38,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 12:33:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-20 12:33:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:33:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-20 12:33:38,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-20 12:33:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:38,665 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-20 12:33:38,666 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:38,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-20 12:33:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:33:38,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:38,667 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:38,667 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:33:38,667 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:38,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-20 12:33:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:38,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506599024] [2024-09-20 12:33:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:38,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647635341] [2024-09-20 12:33:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:38,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:38,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:33:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:38,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:38,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:38,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:38,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506599024] [2024-09-20 12:33:38,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647635341] [2024-09-20 12:33:38,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647635341] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:38,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:38,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:38,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450438373] [2024-09-20 12:33:38,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:38,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:38,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:38,928 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:38,983 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-20 12:33:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-20 12:33:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:38,986 INFO L225 Difference]: With dead ends: 52 [2024-09-20 12:33:38,987 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:33:38,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:38,989 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:38,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:33:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-20 12:33:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:33:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-20 12:33:39,007 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-20 12:33:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:39,011 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-20 12:33:39,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 12:33:39,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-20 12:33:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 12:33:39,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:39,013 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:39,033 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:33:39,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:39,214 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:39,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-20 12:33:39,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:39,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122747261] [2024-09-20 12:33:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122747261] [2024-09-20 12:33:39,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122747261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:39,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683573311] [2024-09-20 12:33:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:39,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:39,386 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:33:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:39,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:39,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:39,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683573311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:39,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:33:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 12:33:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433034143] [2024-09-20 12:33:39,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:39,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:33:39,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:39,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:33:39,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:33:39,570 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:39,725 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-20 12:33:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:33:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-20 12:33:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:39,727 INFO L225 Difference]: With dead ends: 102 [2024-09-20 12:33:39,727 INFO L226 Difference]: Without dead ends: 95 [2024-09-20 12:33:39,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:33:39,728 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:39,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-20 12:33:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-20 12:33:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 12:33:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-20 12:33:39,746 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-20 12:33:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:39,746 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-20 12:33:39,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:33:39,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-20 12:33:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:33:39,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:39,748 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:39,760 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:39,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:39,952 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:39,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-20 12:33:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210024191] [2024-09-20 12:33:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:39,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809138840] [2024-09-20 12:33:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:39,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:39,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:39,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:39,979 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:33:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:40,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 12:33:40,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:40,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:40,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210024191] [2024-09-20 12:33:40,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809138840] [2024-09-20 12:33:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809138840] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:40,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:40,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:40,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923165097] [2024-09-20 12:33:40,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:40,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:40,101 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:40,160 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-20 12:33:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-20 12:33:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:40,162 INFO L225 Difference]: With dead ends: 78 [2024-09-20 12:33:40,163 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 12:33:40,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:40,164 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:40,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 12:33:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-20 12:33:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 12:33:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-20 12:33:40,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-20 12:33:40,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:40,182 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-20 12:33:40,182 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:40,183 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-20 12:33:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:33:40,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:40,184 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:40,198 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:40,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:40,389 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:40,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-20 12:33:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626644717] [2024-09-20 12:33:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:40,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586067708] [2024-09-20 12:33:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:40,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:40,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:40,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:40,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:33:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:40,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 12:33:40,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:33:40,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:40,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626644717] [2024-09-20 12:33:40,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586067708] [2024-09-20 12:33:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586067708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:40,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-20 12:33:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727704384] [2024-09-20 12:33:40,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:40,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 12:33:40,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 12:33:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:33:40,919 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:42,292 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-20 12:33:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:33:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-20 12:33:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:42,294 INFO L225 Difference]: With dead ends: 132 [2024-09-20 12:33:42,294 INFO L226 Difference]: Without dead ends: 130 [2024-09-20 12:33:42,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:33:42,295 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:42,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:33:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-20 12:33:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-20 12:33:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:33:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-20 12:33:42,317 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-20 12:33:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:42,317 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-20 12:33:42,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:42,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-20 12:33:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:33:42,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:42,319 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:42,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:33:42,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:42,520 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:42,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-20 12:33:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:42,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16511954] [2024-09-20 12:33:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:42,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960184356] [2024-09-20 12:33:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:42,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:42,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:42,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:42,534 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:33:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:42,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:33:42,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 12:33:42,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16511954] [2024-09-20 12:33:42,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960184356] [2024-09-20 12:33:42,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960184356] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:42,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367874666] [2024-09-20 12:33:42,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:42,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:42,605 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:42,681 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-20 12:33:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-20 12:33:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:42,687 INFO L225 Difference]: With dead ends: 155 [2024-09-20 12:33:42,687 INFO L226 Difference]: Without dead ends: 153 [2024-09-20 12:33:42,687 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:42,688 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:42,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-20 12:33:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-20 12:33:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 12:33:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-20 12:33:42,719 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-20 12:33:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:42,719 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-20 12:33:42,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 12:33:42,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-20 12:33:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 12:33:42,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:42,721 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:42,733 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:33:42,921 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:33:42,922 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:42,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-20 12:33:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:42,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460021185] [2024-09-20 12:33:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:42,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593648188] [2024-09-20 12:33:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:42,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:42,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:42,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:33:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:42,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:33:42,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:43,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460021185] [2024-09-20 12:33:43,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:43,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593648188] [2024-09-20 12:33:43,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593648188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:43,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:33:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-20 12:33:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660784544] [2024-09-20 12:33:43,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:43,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:33:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:33:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:33:43,132 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:43,297 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-20 12:33:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:33:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-20 12:33:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:43,299 INFO L225 Difference]: With dead ends: 174 [2024-09-20 12:33:43,299 INFO L226 Difference]: Without dead ends: 172 [2024-09-20 12:33:43,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:33:43,300 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:43,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-20 12:33:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-20 12:33:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-20 12:33:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-20 12:33:43,337 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-20 12:33:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:43,337 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-20 12:33:43,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:43,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-20 12:33:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:33:43,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:43,339 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:43,352 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:33:43,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:43,543 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:43,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-20 12:33:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088859799] [2024-09-20 12:33:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:43,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667854839] [2024-09-20 12:33:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:43,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:43,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:43,558 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:33:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:43,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:33:43,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 12:33:43,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:33:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088859799] [2024-09-20 12:33:43,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667854839] [2024-09-20 12:33:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667854839] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:43,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976589267] [2024-09-20 12:33:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:43,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:43,621 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:33:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:43,701 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-20 12:33:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-20 12:33:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:43,703 INFO L225 Difference]: With dead ends: 254 [2024-09-20 12:33:43,703 INFO L226 Difference]: Without dead ends: 252 [2024-09-20 12:33:43,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:43,704 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:43,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-20 12:33:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-20 12:33:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 12:33:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-20 12:33:43,757 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-20 12:33:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:43,757 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-20 12:33:43,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:33:43,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-20 12:33:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 12:33:43,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:43,759 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:43,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:33:43,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:43,960 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:43,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-20 12:33:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948033015] [2024-09-20 12:33:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:33:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:33:44,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:44,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948033015] [2024-09-20 12:33:44,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948033015] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:44,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580246111] [2024-09-20 12:33:44,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:44,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:44,030 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:44,117 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-20 12:33:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:33:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-20 12:33:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:44,120 INFO L225 Difference]: With dead ends: 291 [2024-09-20 12:33:44,120 INFO L226 Difference]: Without dead ends: 177 [2024-09-20 12:33:44,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:33:44,121 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:44,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-20 12:33:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-20 12:33:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-20 12:33:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-20 12:33:44,154 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-20 12:33:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:44,154 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-20 12:33:44,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 12:33:44,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-20 12:33:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:33:44,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:44,156 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:44,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 12:33:44,156 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:44,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-20 12:33:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:44,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789493234] [2024-09-20 12:33:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777130662] [2024-09-20 12:33:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:44,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:44,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:44,175 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:33:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:44,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 12:33:44,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 12:33:44,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 12:33:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789493234] [2024-09-20 12:33:46,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777130662] [2024-09-20 12:33:46,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777130662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:46,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:46,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:33:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7587560] [2024-09-20 12:33:46,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:46,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:33:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:33:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:33:46,171 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 12:33:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:50,131 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-20 12:33:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 12:33:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-20 12:33:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:50,133 INFO L225 Difference]: With dead ends: 393 [2024-09-20 12:33:50,134 INFO L226 Difference]: Without dead ends: 385 [2024-09-20 12:33:50,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 12:33:50,135 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:50,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 12:33:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-20 12:33:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-20 12:33:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-20 12:33:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-20 12:33:50,218 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-20 12:33:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:50,218 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-20 12:33:50,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 12:33:50,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-20 12:33:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:50,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:50,219 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:50,231 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 12:33:50,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:50,423 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:50,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-20 12:33:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:50,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847958546] [2024-09-20 12:33:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:33:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:33:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:33:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:33:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:33:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:33:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:33:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:33:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:33:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 12:33:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 12:33:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 12:33:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847958546] [2024-09-20 12:33:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847958546] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:33:50,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:33:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:33:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621186424] [2024-09-20 12:33:50,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:50,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:33:50,504 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:33:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:50,658 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-20 12:33:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:50,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-20 12:33:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:50,662 INFO L225 Difference]: With dead ends: 399 [2024-09-20 12:33:50,663 INFO L226 Difference]: Without dead ends: 243 [2024-09-20 12:33:50,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:33:50,664 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:50,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:33:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-20 12:33:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-20 12:33:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 12:33:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-20 12:33:50,744 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-20 12:33:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:50,745 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-20 12:33:50,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 12:33:50,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-20 12:33:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 12:33:50,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:50,746 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:50,746 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-20 12:33:50,746 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:50,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-20 12:33:50,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:50,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562735898] [2024-09-20 12:33:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:50,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690688620] [2024-09-20 12:33:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:50,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:50,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:50,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:33:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:50,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:33:50,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-20 12:33:50,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-20 12:33:50,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562735898] [2024-09-20 12:33:50,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690688620] [2024-09-20 12:33:50,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690688620] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:33:50,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:33:50,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 12:33:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272601548] [2024-09-20 12:33:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:33:50,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:33:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:33:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:33:50,924 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 12:33:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:51,046 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-20 12:33:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:33:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-20 12:33:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:51,048 INFO L225 Difference]: With dead ends: 234 [2024-09-20 12:33:51,048 INFO L226 Difference]: Without dead ends: 232 [2024-09-20 12:33:51,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:33:51,049 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:51,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:33:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-20 12:33:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-20 12:33:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 12:33:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-20 12:33:51,137 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-20 12:33:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:51,137 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-20 12:33:51,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 12:33:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-20 12:33:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:51,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:51,138 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:51,165 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:33:51,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:33:51,338 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:51,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-20 12:33:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:51,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185218422] [2024-09-20 12:33:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:51,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279009503] [2024-09-20 12:33:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:51,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:51,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:33:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:51,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 12:33:51,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 12:33:51,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 12:33:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185218422] [2024-09-20 12:33:52,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279009503] [2024-09-20 12:33:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279009503] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:52,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 12:33:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7554962] [2024-09-20 12:33:52,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:52,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:33:52,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:33:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 12:33:52,642 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:33:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:57,399 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-20 12:33:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:33:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-20 12:33:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:57,417 INFO L225 Difference]: With dead ends: 350 [2024-09-20 12:33:57,417 INFO L226 Difference]: Without dead ends: 348 [2024-09-20 12:33:57,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:33:57,418 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:57,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 444 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-20 12:33:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-20 12:33:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-20 12:33:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-09-20 12:33:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-20 12:33:57,572 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-20 12:33:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:57,572 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-20 12:33:57,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:33:57,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-20 12:33:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 12:33:57,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:57,574 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:57,601 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:33:57,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:33:57,775 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-20 12:33:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920521396] [2024-09-20 12:33:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199080412] [2024-09-20 12:33:57,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:33:57,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:57,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:57,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:33:57,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:33:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:33:57,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:33:57,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:33:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 12:33:58,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:33:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-20 12:33:58,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:33:58,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920521396] [2024-09-20 12:33:58,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:33:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199080412] [2024-09-20 12:33:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199080412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:33:58,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:33:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-20 12:33:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934127291] [2024-09-20 12:33:58,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:33:58,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:33:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:33:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:33:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:33:58,114 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:33:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:33:58,945 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-20 12:33:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:33:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-20 12:33:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:33:58,948 INFO L225 Difference]: With dead ends: 426 [2024-09-20 12:33:58,948 INFO L226 Difference]: Without dead ends: 424 [2024-09-20 12:33:58,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:33:58,949 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:33:58,949 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:33:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-20 12:33:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-20 12:33:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-09-20 12:33:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-20 12:33:59,155 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-20 12:33:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:33:59,156 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-20 12:33:59,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:33:59,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-20 12:33:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 12:33:59,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:33:59,158 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:33:59,164 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 12:33:59,358 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:33:59,359 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:33:59,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:33:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-20 12:33:59,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:33:59,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406525951] [2024-09-20 12:33:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:33:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:33:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003772285] [2024-09-20 12:33:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:33:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:33:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:33:59,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:33:59,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:33:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:33:59,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 12:33:59,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-20 12:34:00,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 12:34:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406525951] [2024-09-20 12:34:02,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003772285] [2024-09-20 12:34:02,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003772285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:02,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:02,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-20 12:34:02,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832722798] [2024-09-20 12:34:02,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:02,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:34:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:34:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:34:02,694 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 12:34:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:09,179 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-20 12:34:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 12:34:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-20 12:34:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:09,182 INFO L225 Difference]: With dead ends: 544 [2024-09-20 12:34:09,182 INFO L226 Difference]: Without dead ends: 540 [2024-09-20 12:34:09,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 12:34:09,184 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:09,184 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 683 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 12:34:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-20 12:34:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-20 12:34:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-20 12:34:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-20 12:34:09,517 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-20 12:34:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:09,518 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-20 12:34:09,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 12:34:09,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-20 12:34:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 12:34:09,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:09,520 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:09,536 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 12:34:09,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:34:09,720 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:09,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-20 12:34:09,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:09,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355409303] [2024-09-20 12:34:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:09,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:09,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847564537] [2024-09-20 12:34:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:09,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:09,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:09,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:09,738 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:34:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:09,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:34:09,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-20 12:34:09,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-20 12:34:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355409303] [2024-09-20 12:34:10,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847564537] [2024-09-20 12:34:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847564537] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:10,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 12:34:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743438365] [2024-09-20 12:34:10,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:10,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:34:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:34:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:34:10,350 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:34:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:12,278 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-20 12:34:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:34:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-20 12:34:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:12,291 INFO L225 Difference]: With dead ends: 1227 [2024-09-20 12:34:12,295 INFO L226 Difference]: Without dead ends: 1225 [2024-09-20 12:34:12,296 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 12:34:12,297 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 141 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:12,297 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:34:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-20 12:34:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-20 12:34:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:34:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-20 12:34:13,368 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-20 12:34:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:13,374 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-20 12:34:13,374 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 12:34:13,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-20 12:34:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-20 12:34:13,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:13,383 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:13,401 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:34:13,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:34:13,584 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:13,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:13,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-20 12:34:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915080722] [2024-09-20 12:34:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:13,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722765746] [2024-09-20 12:34:13,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:34:13,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:13,641 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:13,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:34:13,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:34:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:13,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 12:34:13,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 12:34:14,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 12:34:14,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915080722] [2024-09-20 12:34:14,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722765746] [2024-09-20 12:34:14,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722765746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:14,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:14,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-20 12:34:14,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708002160] [2024-09-20 12:34:14,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:14,455 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 12:34:14,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 12:34:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-20 12:34:14,460 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 12:34:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:17,009 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-20 12:34:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:34:17,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-20 12:34:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:17,017 INFO L225 Difference]: With dead ends: 1373 [2024-09-20 12:34:17,017 INFO L226 Difference]: Without dead ends: 1369 [2024-09-20 12:34:17,018 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:34:17,019 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:17,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:34:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-20 12:34:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-20 12:34:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:34:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-20 12:34:18,125 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-20 12:34:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:18,126 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-20 12:34:18,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 12:34:18,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-20 12:34:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 12:34:18,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:18,128 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:18,134 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 12:34:18,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 12:34:18,329 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:18,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-20 12:34:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:18,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023311934] [2024-09-20 12:34:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:18,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:34:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:34:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:34:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:34:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:34:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:34:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:34:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:34:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:34:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 12:34:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 12:34:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 12:34:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 12:34:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:34:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:34:18,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023311934] [2024-09-20 12:34:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023311934] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:34:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617493126] [2024-09-20 12:34:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:34:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:18,520 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:18,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:34:18,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:34:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:18,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:34:18,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:34:18,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 12:34:18,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617493126] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:18,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:34:18,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-20 12:34:18,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470780611] [2024-09-20 12:34:18,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:18,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:34:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:18,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:34:18,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:34:18,738 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:34:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:34:20,333 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-20 12:34:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:34:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-20 12:34:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:34:20,340 INFO L225 Difference]: With dead ends: 1291 [2024-09-20 12:34:20,340 INFO L226 Difference]: Without dead ends: 1286 [2024-09-20 12:34:20,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:34:20,343 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:34:20,343 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:34:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-20 12:34:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-20 12:34:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 12:34:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-20 12:34:21,385 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-20 12:34:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:34:21,385 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-20 12:34:21,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 12:34:21,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-20 12:34:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-20 12:34:21,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:34:21,387 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:34:21,394 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 12:34:21,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:21,592 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:34:21,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:34:21,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-20 12:34:21,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:34:21,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619161933] [2024-09-20 12:34:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:34:21,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:34:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:34:21,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92415604] [2024-09-20 12:34:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:34:21,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:34:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:34:21,607 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:34:21,609 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:34:21,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:34:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:34:21,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-20 12:34:21,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:34:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 12:34:22,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:34:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 12:34:26,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:34:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619161933] [2024-09-20 12:34:26,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:34:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92415604] [2024-09-20 12:34:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92415604] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:34:26,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:34:26,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2024-09-20 12:34:26,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411059414] [2024-09-20 12:34:26,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:34:26,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 12:34:26,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:34:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 12:34:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 12:34:26,851 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 12:34:39,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:34:44,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:35:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:35:01,222 INFO L93 Difference]: Finished difference Result 1643 states and 2666 transitions. [2024-09-20 12:35:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-20 12:35:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 112 [2024-09-20 12:35:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:35:01,229 INFO L225 Difference]: With dead ends: 1643 [2024-09-20 12:35:01,229 INFO L226 Difference]: Without dead ends: 1244 [2024-09-20 12:35:01,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1625, Invalid=8077, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 12:35:01,234 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 298 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:35:01,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 978 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1351 Invalid, 1 Unknown, 0 Unchecked, 12.8s Time] [2024-09-20 12:35:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-09-20 12:35:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1002. [2024-09-20 12:35:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 495 states have (on average 1.298989898989899) internal successors, (643), 495 states have internal predecessors, (643), 479 states have call successors, (479), 29 states have call predecessors, (479), 27 states have return successors, (477), 477 states have call predecessors, (477), 477 states have call successors, (477) [2024-09-20 12:35:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1599 transitions. [2024-09-20 12:35:02,980 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1599 transitions. Word has length 112 [2024-09-20 12:35:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:35:02,981 INFO L474 AbstractCegarLoop]: Abstraction has 1002 states and 1599 transitions. [2024-09-20 12:35:02,981 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 12:35:02,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1599 transitions. [2024-09-20 12:35:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 12:35:02,983 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:35:02,983 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:35:03,001 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 12:35:03,187 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:03,188 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:35:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-20 12:35:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:35:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105240175] [2024-09-20 12:35:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:35:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:35:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:35:03,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720890343] [2024-09-20 12:35:03,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:35:03,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:03,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:35:03,209 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:35:03,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:35:03,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:35:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:35:03,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 12:35:03,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:35:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 12:35:04,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:35:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 12:35:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:35:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105240175] [2024-09-20 12:35:07,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:35:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720890343] [2024-09-20 12:35:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720890343] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:35:07,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:35:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-20 12:35:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259499834] [2024-09-20 12:35:07,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:35:07,054 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 12:35:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:35:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 12:35:07,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:35:07,057 INFO L87 Difference]: Start difference. First operand 1002 states and 1599 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 12:35:22,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:35:22,621 INFO L93 Difference]: Finished difference Result 1406 states and 2243 transitions. [2024-09-20 12:35:22,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-20 12:35:22,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-20 12:35:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:35:22,628 INFO L225 Difference]: With dead ends: 1406 [2024-09-20 12:35:22,628 INFO L226 Difference]: Without dead ends: 1400 [2024-09-20 12:35:22,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1592, Invalid=7914, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 12:35:22,631 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 321 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:35:22,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 850 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-20 12:35:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-09-20 12:35:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1181. [2024-09-20 12:35:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 588 states have (on average 1.2976190476190477) internal successors, (763), 588 states have internal predecessors, (763), 563 states have call successors, (563), 31 states have call predecessors, (563), 29 states have return successors, (561), 561 states have call predecessors, (561), 561 states have call successors, (561) [2024-09-20 12:35:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1887 transitions. [2024-09-20 12:35:24,446 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1887 transitions. Word has length 115 [2024-09-20 12:35:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:35:24,447 INFO L474 AbstractCegarLoop]: Abstraction has 1181 states and 1887 transitions. [2024-09-20 12:35:24,447 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 12:35:24,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1887 transitions. [2024-09-20 12:35:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 12:35:24,448 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:35:24,448 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:35:24,461 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 12:35:24,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:24,650 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:35:24,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-20 12:35:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:35:24,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555633121] [2024-09-20 12:35:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:35:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:35:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:35:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217142542] [2024-09-20 12:35:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:35:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:35:24,683 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:35:24,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:35:24,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:35:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:35:24,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-20 12:35:24,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:35:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 12:35:26,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:35:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:35:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555633121] [2024-09-20 12:35:31,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:35:31,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217142542] [2024-09-20 12:35:31,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217142542] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:35:31,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:35:31,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 12:35:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355256637] [2024-09-20 12:35:31,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:35:31,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 12:35:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:35:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 12:35:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:35:31,532 INFO L87 Difference]: Start difference. First operand 1181 states and 1887 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:35:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:35:34,999 INFO L93 Difference]: Finished difference Result 1325 states and 2100 transitions. [2024-09-20 12:35:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:35:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-20 12:35:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:35:35,006 INFO L225 Difference]: With dead ends: 1325 [2024-09-20 12:35:35,006 INFO L226 Difference]: Without dead ends: 1320 [2024-09-20 12:35:35,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 12:35:35,007 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 12:35:35,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 541 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 12:35:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-09-20 12:35:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1295. [2024-09-20 12:35:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 642 states have (on average 1.2990654205607477) internal successors, (834), 642 states have internal predecessors, (834), 619 states have call successors, (619), 35 states have call predecessors, (619), 33 states have return successors, (617), 617 states have call predecessors, (617), 617 states have call successors, (617) [2024-09-20 12:35:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2070 transitions. [2024-09-20 12:35:36,882 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2070 transitions. Word has length 115 [2024-09-20 12:35:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:35:36,882 INFO L474 AbstractCegarLoop]: Abstraction has 1295 states and 2070 transitions. [2024-09-20 12:35:36,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:35:36,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2070 transitions. [2024-09-20 12:35:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 12:35:36,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:35:36,884 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:35:36,898 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 12:35:37,084 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 12:35:37,084 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:35:37,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-20 12:35:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:35:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545238340] [2024-09-20 12:35:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:35:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:35:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:35:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376121607] [2024-09-20 12:35:37,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:35:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:37,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:35:37,110 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:35:37,115 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:35:37,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 12:35:37,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:35:37,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-20 12:35:37,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:35:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-09-20 12:35:38,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:35:42,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:35:42,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545238340] [2024-09-20 12:35:42,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:35:42,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376121607] [2024-09-20 12:35:42,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376121607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:35:42,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:35:42,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 12:35:42,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282619252] [2024-09-20 12:35:42,274 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:35:42,274 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 12:35:42,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:35:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 12:35:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:35:42,275 INFO L87 Difference]: Start difference. First operand 1295 states and 2070 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:35:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:35:46,981 INFO L93 Difference]: Finished difference Result 1521 states and 2421 transitions. [2024-09-20 12:35:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 12:35:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 120 [2024-09-20 12:35:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:35:46,989 INFO L225 Difference]: With dead ends: 1521 [2024-09-20 12:35:46,989 INFO L226 Difference]: Without dead ends: 1516 [2024-09-20 12:35:46,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:35:46,990 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:35:46,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 951 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:35:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2024-09-20 12:35:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1386. [2024-09-20 12:35:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 685 states have (on average 1.2992700729927007) internal successors, (890), 685 states have internal predecessors, (890), 663 states have call successors, (663), 39 states have call predecessors, (663), 37 states have return successors, (661), 661 states have call predecessors, (661), 661 states have call successors, (661) [2024-09-20 12:35:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2214 transitions. [2024-09-20 12:35:49,294 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2214 transitions. Word has length 120 [2024-09-20 12:35:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:35:49,295 INFO L474 AbstractCegarLoop]: Abstraction has 1386 states and 2214 transitions. [2024-09-20 12:35:49,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 12:35:49,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2214 transitions. [2024-09-20 12:35:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-20 12:35:49,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:35:49,297 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:35:49,303 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 12:35:49,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 12:35:49,500 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:35:49,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:35:49,501 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-20 12:35:49,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:35:49,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496257695] [2024-09-20 12:35:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:35:49,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:35:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:35:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065619516] [2024-09-20 12:35:49,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:35:49,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:35:49,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:35:49,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:35:49,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:35:49,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 12:35:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:35:49,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 12:35:49,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:35:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 12:35:50,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:35:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 12:35:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:35:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496257695] [2024-09-20 12:35:53,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:35:53,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065619516] [2024-09-20 12:35:53,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065619516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:35:53,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:35:53,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-09-20 12:35:53,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524245396] [2024-09-20 12:35:53,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:35:53,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:35:53,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:35:53,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:35:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:35:53,943 INFO L87 Difference]: Start difference. First operand 1386 states and 2214 transitions. Second operand has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:36:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:36:06,984 INFO L93 Difference]: Finished difference Result 2389 states and 3902 transitions. [2024-09-20 12:36:06,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 12:36:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 132 [2024-09-20 12:36:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:36:06,996 INFO L225 Difference]: With dead ends: 2389 [2024-09-20 12:36:06,996 INFO L226 Difference]: Without dead ends: 2383 [2024-09-20 12:36:06,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1501, Invalid=9419, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:36:06,999 INFO L434 NwaCegarLoop]: 82 mSDtfsCounter, 238 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:36:06,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1302 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-20 12:36:07,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2024-09-20 12:36:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1680. [2024-09-20 12:36:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 822 states have (on average 1.3065693430656935) internal successors, (1074), 822 states have internal predecessors, (1074), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-20 12:36:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2710 transitions. [2024-09-20 12:36:09,799 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2710 transitions. Word has length 132 [2024-09-20 12:36:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:36:09,799 INFO L474 AbstractCegarLoop]: Abstraction has 1680 states and 2710 transitions. [2024-09-20 12:36:09,800 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:36:09,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2710 transitions. [2024-09-20 12:36:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-20 12:36:09,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:36:09,802 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:36:09,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 12:36:10,006 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:36:10,007 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:36:10,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash 125055237, now seen corresponding path program 7 times [2024-09-20 12:36:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:36:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947141491] [2024-09-20 12:36:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:36:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:36:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:36:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:36:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:36:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:36:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 12:36:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 12:36:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 12:36:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 12:36:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 12:36:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:36:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:36:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 12:36:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 12:36:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 12:36:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:36:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:36:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 12:36:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:36:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:36:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 12:36:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-20 12:36:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-20 12:36:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:36:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947141491] [2024-09-20 12:36:10,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947141491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:36:10,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995002121] [2024-09-20 12:36:10,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:36:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:36:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:36:10,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:36:10,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:36:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:36:10,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 12:36:10,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:36:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 250 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-20 12:36:10,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:36:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-20 12:36:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995002121] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:36:10,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:36:10,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-20 12:36:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577528775] [2024-09-20 12:36:10,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:36:10,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 12:36:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:36:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 12:36:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:36:10,327 INFO L87 Difference]: Start difference. First operand 1680 states and 2710 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-20 12:36:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:36:13,766 INFO L93 Difference]: Finished difference Result 2843 states and 4592 transitions. [2024-09-20 12:36:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 12:36:13,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 137 [2024-09-20 12:36:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:36:13,789 INFO L225 Difference]: With dead ends: 2843 [2024-09-20 12:36:13,789 INFO L226 Difference]: Without dead ends: 1920 [2024-09-20 12:36:13,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 311 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:36:13,804 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:36:13,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:36:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2024-09-20 12:36:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1741. [2024-09-20 12:36:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 883 states have (on average 1.2865232163080407) internal successors, (1136), 907 states have internal predecessors, (1136), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 793 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-20 12:36:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2772 transitions. [2024-09-20 12:36:16,844 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2772 transitions. Word has length 137 [2024-09-20 12:36:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:36:16,846 INFO L474 AbstractCegarLoop]: Abstraction has 1741 states and 2772 transitions. [2024-09-20 12:36:16,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-20 12:36:16,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2772 transitions. [2024-09-20 12:36:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-20 12:36:16,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:36:16,852 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:36:16,877 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 12:36:17,053 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:36:17,053 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:36:17,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:36:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-09-20 12:36:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:36:17,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826080364] [2024-09-20 12:36:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:36:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:36:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:36:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333618389] [2024-09-20 12:36:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:36:17,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:36:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:36:17,093 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:36:17,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:36:17,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:36:17,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:36:17,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-20 12:36:17,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:36:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 82 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 12:36:18,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:36:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-20 12:36:23,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:36:23,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826080364] [2024-09-20 12:36:23,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:36:23,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333618389] [2024-09-20 12:36:23,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333618389] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:36:23,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:36:23,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2024-09-20 12:36:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591750017] [2024-09-20 12:36:23,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:36:23,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 12:36:23,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:36:23,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 12:36:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:36:23,155 INFO L87 Difference]: Start difference. First operand 1741 states and 2772 transitions. Second operand has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:36:30,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:36:58,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:37:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:37:17,146 INFO L93 Difference]: Finished difference Result 2076 states and 3230 transitions. [2024-09-20 12:37:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-20 12:37:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 140 [2024-09-20 12:37:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:37:17,156 INFO L225 Difference]: With dead ends: 2076 [2024-09-20 12:37:17,157 INFO L226 Difference]: Without dead ends: 1901 [2024-09-20 12:37:17,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=2237, Invalid=8682, Unknown=1, NotChecked=0, Total=10920 [2024-09-20 12:37:17,160 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:37:17,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 908 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2024-09-20 12:37:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2024-09-20 12:37:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1774. [2024-09-20 12:37:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 907 states have (on average 1.2855567805953694) internal successors, (1166), 936 states have internal predecessors, (1166), 827 states have call successors, (827), 41 states have call predecessors, (827), 39 states have return successors, (825), 796 states have call predecessors, (825), 825 states have call successors, (825) [2024-09-20 12:37:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2818 transitions. [2024-09-20 12:37:21,422 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2818 transitions. Word has length 140 [2024-09-20 12:37:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:37:21,422 INFO L474 AbstractCegarLoop]: Abstraction has 1774 states and 2818 transitions. [2024-09-20 12:37:21,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 12:37:21,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2818 transitions. [2024-09-20 12:37:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 12:37:21,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:37:21,424 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:37:21,437 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 12:37:21,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:37:21,629 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:37:21,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1581427678, now seen corresponding path program 9 times [2024-09-20 12:37:21,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:37:21,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548489630] [2024-09-20 12:37:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:37:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:37:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:37:21,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067365925] [2024-09-20 12:37:21,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:37:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:37:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:37:21,648 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:37:21,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 12:37:21,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:37:21,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:37:21,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 12:37:21,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:37:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 70 proven. 88 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 12:37:23,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:37:28,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:37:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548489630] [2024-09-20 12:37:28,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:37:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067365925] [2024-09-20 12:37:28,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067365925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:37:28,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:37:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 12:37:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627671269] [2024-09-20 12:37:28,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:37:28,361 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:37:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:37:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:37:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 12:37:28,362 INFO L87 Difference]: Start difference. First operand 1774 states and 2818 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 12:37:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:37:35,231 INFO L93 Difference]: Finished difference Result 2041 states and 3249 transitions. [2024-09-20 12:37:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 12:37:35,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2024-09-20 12:37:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:37:35,240 INFO L225 Difference]: With dead ends: 2041 [2024-09-20 12:37:35,241 INFO L226 Difference]: Without dead ends: 2036 [2024-09-20 12:37:35,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:37:35,241 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:37:35,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 622 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 12:37:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2024-09-20 12:37:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1822. [2024-09-20 12:37:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 930 states have (on average 1.2860215053763442) internal successors, (1196), 959 states have internal predecessors, (1196), 851 states have call successors, (851), 42 states have call predecessors, (851), 40 states have return successors, (849), 820 states have call predecessors, (849), 849 states have call successors, (849) [2024-09-20 12:37:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2896 transitions. [2024-09-20 12:37:39,600 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2896 transitions. Word has length 142 [2024-09-20 12:37:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:37:39,601 INFO L474 AbstractCegarLoop]: Abstraction has 1822 states and 2896 transitions. [2024-09-20 12:37:39,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 12:37:39,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2896 transitions. [2024-09-20 12:37:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-20 12:37:39,603 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:37:39,603 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:37:39,616 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 12:37:39,807 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 12:37:39,808 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:37:39,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1042986500, now seen corresponding path program 10 times [2024-09-20 12:37:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:37:39,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68944027] [2024-09-20 12:37:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:37:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:37:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:37:39,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932424843] [2024-09-20 12:37:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:37:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:37:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:37:39,830 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:37:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 12:37:39,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:37:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:37:39,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-20 12:37:39,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:37:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 76 proven. 94 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 12:37:41,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:37:46,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:37:46,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68944027] [2024-09-20 12:37:46,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:37:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932424843] [2024-09-20 12:37:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932424843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:37:46,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:37:46,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 12:37:46,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572862140] [2024-09-20 12:37:46,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 12:37:46,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 12:37:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:37:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 12:37:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:37:46,458 INFO L87 Difference]: Start difference. First operand 1822 states and 2896 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 12:37:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:37:53,514 INFO L93 Difference]: Finished difference Result 2125 states and 3361 transitions. [2024-09-20 12:37:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 12:37:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 145 [2024-09-20 12:37:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:37:53,523 INFO L225 Difference]: With dead ends: 2125 [2024-09-20 12:37:53,524 INFO L226 Difference]: Without dead ends: 2120 [2024-09-20 12:37:53,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:37:53,525 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:37:53,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 977 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 12:37:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2024-09-20 12:37:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2062. [2024-09-20 12:37:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1049 states have (on average 1.2878932316491898) internal successors, (1351), 1084 states have internal predecessors, (1351), 966 states have call successors, (966), 48 states have call predecessors, (966), 46 states have return successors, (964), 929 states have call predecessors, (964), 964 states have call successors, (964) [2024-09-20 12:37:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3281 transitions. [2024-09-20 12:37:58,654 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3281 transitions. Word has length 145 [2024-09-20 12:37:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:37:58,655 INFO L474 AbstractCegarLoop]: Abstraction has 2062 states and 3281 transitions. [2024-09-20 12:37:58,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 12:37:58,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3281 transitions. [2024-09-20 12:37:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-20 12:37:58,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:37:58,657 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:37:58,672 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 12:37:58,861 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 12:37:58,862 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:37:58,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:37:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash -723812761, now seen corresponding path program 11 times [2024-09-20 12:37:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:37:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982893449] [2024-09-20 12:37:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:37:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:37:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:37:58,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426562072] [2024-09-20 12:37:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:37:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:37:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:37:58,887 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:37:58,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 12:37:59,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-20 12:37:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:37:59,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-09-20 12:37:59,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:38:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 92 proven. 173 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 12:38:00,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:38:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 103 proven. 162 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 12:38:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:38:09,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982893449] [2024-09-20 12:38:09,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:38:09,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426562072] [2024-09-20 12:38:09,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426562072] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:38:09,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:38:09,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 53 [2024-09-20 12:38:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616392509] [2024-09-20 12:38:09,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:38:09,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-20 12:38:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:38:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-20 12:38:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2457, Unknown=1, NotChecked=0, Total=2756 [2024-09-20 12:38:09,736 INFO L87 Difference]: Start difference. First operand 2062 states and 3281 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 46 states have internal predecessors, (104), 19 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40)