./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.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 de325976 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/prodbin-ll_unwindbound100.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 d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 --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-de32597-m [2024-09-18 16:32:31,360 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:32:31,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:32:31,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:32:31,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:32:31,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:32:31,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:32:31,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:32:31,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:32:31,444 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:32:31,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:32:31,445 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:32:31,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:32:31,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:32:31,446 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:32:31,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:32:31,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:32:31,447 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:32:31,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:32:31,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:32:31,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:32:31,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:32:31,452 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:32:31,452 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:32:31,452 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:32:31,453 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:32:31,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:32:31,453 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:32:31,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:32:31,454 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:32:31,454 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:32:31,454 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:32:31,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:32:31,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:32:31,455 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:32:31,455 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:32:31,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:32:31,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:32:31,456 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:32:31,456 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:32:31,456 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:32:31,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:32:31,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:32:31,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:32:31,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:32:31,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:32:31,759 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:32:31,759 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:32:31,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-18 16:32:33,168 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:32:33,324 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:32:33,325 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-18 16:32:33,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c445389b2/453af959d88c4d1d9a87afa562f71efb/FLAGed860316d [2024-09-18 16:32:33,723 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c445389b2/453af959d88c4d1d9a87afa562f71efb [2024-09-18 16:32:33,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:32:33,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:32:33,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:32:33,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:32:33,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:32:33,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd91b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33, skipping insertion in model container [2024-09-18 16:32:33,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:32:33,891 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/prodbin-ll_unwindbound100.c[1263,1276] [2024-09-18 16:32:33,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:32:33,912 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:32:33,927 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/prodbin-ll_unwindbound100.c[1263,1276] [2024-09-18 16:32:33,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:32:33,946 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:32:33,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33 WrapperNode [2024-09-18 16:32:33,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:32:33,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:32:33,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:32:33,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:32:33,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,966 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:32:33,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:32:33,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:32:33,968 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:32:33,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:32:33,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,977 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,987 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]. [2024-09-18 16:32:33,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,988 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,994 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,995 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:33,996 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:32:33,997 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:32:33,998 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:32:33,998 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:32:33,998 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (1/1) ... [2024-09-18 16:32:34,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:32:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:34,023 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) [2024-09-18 16:32:34,025 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 [2024-09-18 16:32:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:32:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:32:34,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:32:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:32:34,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:32:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:32:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:32:34,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:32:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:32:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:32:34,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:32:34,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:32:34,135 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:32:34,137 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:32:34,345 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:32:34,345 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:32:34,372 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:32:34,373 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:32:34,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:32:34 BoogieIcfgContainer [2024-09-18 16:32:34,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:32:34,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:32:34,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:32:34,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:32:34,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:32:33" (1/3) ... [2024-09-18 16:32:34,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db47e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:32:34, skipping insertion in model container [2024-09-18 16:32:34,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:32:33" (2/3) ... [2024-09-18 16:32:34,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db47e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:32:34, skipping insertion in model container [2024-09-18 16:32:34,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:32:34" (3/3) ... [2024-09-18 16:32:34,382 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2024-09-18 16:32:34,398 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:32:34,399 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:32:34,460 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:32:34,466 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;@4d635dae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:32:34,467 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:32:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:32:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 16:32:34,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:34,480 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:34,480 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:34,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-18 16:32:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923805744] [2024-09-18 16:32:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:34,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:32:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:34,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:32:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923805744] [2024-09-18 16:32:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923805744] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:32:34,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:32:34,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 16:32:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102448261] [2024-09-18 16:32:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:32:34,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 16:32:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 16:32:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:32:34,698 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:32:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:34,777 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-09-18 16:32:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 16:32:34,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-18 16:32:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:34,787 INFO L225 Difference]: With dead ends: 49 [2024-09-18 16:32:34,787 INFO L226 Difference]: Without dead ends: 25 [2024-09-18 16:32:34,791 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 16:32:34,795 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:34,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-18 16:32:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-18 16:32:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:32:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-18 16:32:34,832 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-18 16:32:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:34,833 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-18 16:32:34,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:32:34,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-18 16:32:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:32:34,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:34,834 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:34,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:32:34,835 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:34,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-18 16:32:34,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446162854] [2024-09-18 16:32:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:34,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:32:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:32:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446162854] [2024-09-18 16:32:35,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446162854] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:32:35,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:32:35,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:32:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427114344] [2024-09-18 16:32:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:32:35,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:32:35,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:32:35,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:32:35,040 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:32:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:35,147 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-18 16:32:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:32:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-18 16:32:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:35,149 INFO L225 Difference]: With dead ends: 33 [2024-09-18 16:32:35,149 INFO L226 Difference]: Without dead ends: 26 [2024-09-18 16:32:35,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:32:35,153 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:35,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-18 16:32:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-18 16:32:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:32:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-18 16:32:35,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-18 16:32:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:35,165 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-18 16:32:35,166 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:32:35,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-18 16:32:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:32:35,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:35,167 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:35,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:32:35,167 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:35,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-18 16:32:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:35,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626153232] [2024-09-18 16:32:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402820023] [2024-09-18 16:32:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:35,194 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) [2024-09-18 16:32:35,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:32:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 16:32:35,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:35,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:32:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626153232] [2024-09-18 16:32:35,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:32:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402820023] [2024-09-18 16:32:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402820023] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:32:35,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:32:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:32:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642868368] [2024-09-18 16:32:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:32:35,422 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:32:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:32:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:32:35,425 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:32:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:35,542 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-09-18 16:32:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:32:35,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-18 16:32:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:35,544 INFO L225 Difference]: With dead ends: 41 [2024-09-18 16:32:35,544 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 16:32:35,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:32:35,546 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:35,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 16:32:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-18 16:32:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 16:32:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-18 16:32:35,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2024-09-18 16:32:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:35,560 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-18 16:32:35,561 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:32:35,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-18 16:32:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:32:35,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:35,563 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:35,581 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:32:35,766 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 [2024-09-18 16:32:35,767 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:35,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-18 16:32:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576084228] [2024-09-18 16:32:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:32:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:32:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-18 16:32:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:35,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576084228] [2024-09-18 16:32:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576084228] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:32:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437793687] [2024-09-18 16:32:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:35,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:35,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:35,992 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) [2024-09-18 16:32:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:32:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:36,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:32:36,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:36,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:36,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437793687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:36,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:32:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-18 16:32:36,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073592588] [2024-09-18 16:32:36,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:36,241 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:32:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:32:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:32:36,245 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:32:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:36,432 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-18 16:32:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:32:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 27 [2024-09-18 16:32:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:36,434 INFO L225 Difference]: With dead ends: 69 [2024-09-18 16:32:36,434 INFO L226 Difference]: Without dead ends: 62 [2024-09-18 16:32:36,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:32:36,438 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:36,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-18 16:32:36,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-18 16:32:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:32:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-18 16:32:36,464 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-18 16:32:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:36,465 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-18 16:32:36,465 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-18 16:32:36,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-18 16:32:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:32:36,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:36,467 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:36,481 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:32:36,668 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 [2024-09-18 16:32:36,669 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:36,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-18 16:32:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:36,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209696696] [2024-09-18 16:32:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:36,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372082956] [2024-09-18 16:32:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:36,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:36,695 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) [2024-09-18 16:32:36,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:32:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:36,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 16:32:36,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:37,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:38,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209696696] [2024-09-18 16:32:38,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:32:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372082956] [2024-09-18 16:32:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372082956] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:38,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:32:38,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-18 16:32:38,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014148] [2024-09-18 16:32:38,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:38,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:32:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:32:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:32:38,172 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:32:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:38,552 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2024-09-18 16:32:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 16:32:38,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-18 16:32:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:38,557 INFO L225 Difference]: With dead ends: 91 [2024-09-18 16:32:38,557 INFO L226 Difference]: Without dead ends: 89 [2024-09-18 16:32:38,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-18 16:32:38,559 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:38,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 173 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:32:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-18 16:32:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-18 16:32:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.21875) internal successors, (78), 69 states have internal predecessors, (78), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:32:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-09-18 16:32:38,591 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2024-09-18 16:32:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:38,591 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-09-18 16:32:38,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 16:32:38,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-09-18 16:32:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:32:38,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:38,593 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:38,610 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 16:32:38,794 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 [2024-09-18 16:32:38,794 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1898211220, now seen corresponding path program 1 times [2024-09-18 16:32:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192433763] [2024-09-18 16:32:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:38,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092906669] [2024-09-18 16:32:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:38,811 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) [2024-09-18 16:32:38,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:32:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:38,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 16:32:38,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:39,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:39,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192433763] [2024-09-18 16:32:39,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:32:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092906669] [2024-09-18 16:32:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092906669] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:39,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:32:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-18 16:32:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142615380] [2024-09-18 16:32:39,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:39,467 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 16:32:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 16:32:39,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:32:39,468 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 16:32:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:39,947 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2024-09-18 16:32:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:32:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2024-09-18 16:32:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:39,950 INFO L225 Difference]: With dead ends: 138 [2024-09-18 16:32:39,950 INFO L226 Difference]: Without dead ends: 127 [2024-09-18 16:32:39,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-09-18 16:32:39,954 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:39,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:32:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-18 16:32:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-18 16:32:39,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:32:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2024-09-18 16:32:39,990 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 27 [2024-09-18 16:32:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:39,991 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2024-09-18 16:32:39,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-18 16:32:39,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2024-09-18 16:32:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 16:32:39,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:39,993 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-18 16:32:40,009 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:32:40,196 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 [2024-09-18 16:32:40,197 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:40,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2085342267, now seen corresponding path program 1 times [2024-09-18 16:32:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475449205] [2024-09-18 16:32:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299286313] [2024-09-18 16:32:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:40,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:40,233 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) [2024-09-18 16:32:40,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:32:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:40,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 16:32:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:32:40,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:32:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475449205] [2024-09-18 16:32:40,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:32:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299286313] [2024-09-18 16:32:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299286313] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:40,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:32:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-18 16:32:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841011615] [2024-09-18 16:32:40,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:40,438 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 16:32:40,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:40,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 16:32:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:32:40,439 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:32:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:40,565 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2024-09-18 16:32:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:32:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-18 16:32:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:40,568 INFO L225 Difference]: With dead ends: 99 [2024-09-18 16:32:40,568 INFO L226 Difference]: Without dead ends: 89 [2024-09-18 16:32:40,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-18 16:32:40,569 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:40,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-18 16:32:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-18 16:32:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 68 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:32:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-09-18 16:32:40,602 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 33 [2024-09-18 16:32:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:40,604 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-09-18 16:32:40,604 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:32:40,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-09-18 16:32:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:32:40,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:40,607 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:40,624 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:32:40,811 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 [2024-09-18 16:32:40,812 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:40,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash -134747104, now seen corresponding path program 1 times [2024-09-18 16:32:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:40,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174662938] [2024-09-18 16:32:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:40,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486815624] [2024-09-18 16:32:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:40,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:40,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:40,843 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) [2024-09-18 16:32:40,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:32:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:40,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 16:32:40,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 16:32:41,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-18 16:32:42,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174662938] [2024-09-18 16:32:42,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:32:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486815624] [2024-09-18 16:32:42,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486815624] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:42,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:32:42,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2024-09-18 16:32:42,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904015840] [2024-09-18 16:32:42,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:42,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 16:32:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:42,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 16:32:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-09-18 16:32:42,989 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:32:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:44,681 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-09-18 16:32:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:32:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2024-09-18 16:32:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:44,684 INFO L225 Difference]: With dead ends: 141 [2024-09-18 16:32:44,684 INFO L226 Difference]: Without dead ends: 139 [2024-09-18 16:32:44,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2024-09-18 16:32:44,685 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:44,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 316 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 16:32:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-18 16:32:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-18 16:32:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 110 states have internal predecessors, (121), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:32:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2024-09-18 16:32:44,738 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 47 [2024-09-18 16:32:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:44,738 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2024-09-18 16:32:44,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:32:44,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2024-09-18 16:32:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 16:32:44,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:44,741 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:44,756 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 16:32:44,941 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 [2024-09-18 16:32:44,942 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:44,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2108223176, now seen corresponding path program 2 times [2024-09-18 16:32:44,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282468857] [2024-09-18 16:32:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:32:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:32:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-18 16:32:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 16:32:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:32:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-18 16:32:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:32:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:32:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:32:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282468857] [2024-09-18 16:32:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282468857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:32:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395363966] [2024-09-18 16:32:45,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:32:45,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:45,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:45,213 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) [2024-09-18 16:32:45,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:32:45,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:32:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:32:45,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 16:32:45,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:32:45,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:32:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:32:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395363966] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:32:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:32:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-18 16:32:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199655963] [2024-09-18 16:32:45,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:32:45,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 16:32:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:32:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 16:32:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:32:45,467 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:32:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:32:45,852 INFO L93 Difference]: Finished difference Result 315 states and 366 transitions. [2024-09-18 16:32:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-18 16:32:45,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 57 [2024-09-18 16:32:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:32:45,855 INFO L225 Difference]: With dead ends: 315 [2024-09-18 16:32:45,855 INFO L226 Difference]: Without dead ends: 308 [2024-09-18 16:32:45,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 16:32:45,857 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:32:45,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 91 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:32:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-09-18 16:32:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2024-09-18 16:32:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.1330472103004292) internal successors, (264), 244 states have internal predecessors, (264), 36 states have call successors, (36), 29 states have call predecessors, (36), 28 states have return successors, (34), 24 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-18 16:32:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 334 transitions. [2024-09-18 16:32:45,929 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 334 transitions. Word has length 57 [2024-09-18 16:32:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:32:45,930 INFO L474 AbstractCegarLoop]: Abstraction has 298 states and 334 transitions. [2024-09-18 16:32:45,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-18 16:32:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 334 transitions. [2024-09-18 16:32:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 16:32:45,931 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:32:45,931 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:32:45,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:32:46,132 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 [2024-09-18 16:32:46,132 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:32:46,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:32:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1644319050, now seen corresponding path program 2 times [2024-09-18 16:32:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:32:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145700626] [2024-09-18 16:32:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:32:46,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:32:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:32:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051241074] [2024-09-18 16:32:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:32:46,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:32:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:32:46,179 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) [2024-09-18 16:32:46,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:32:46,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:32:46,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:32:46,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-18 16:32:46,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:32:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 16:32:48,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:33:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 16:33:09,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:33:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145700626] [2024-09-18 16:33:09,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:33:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051241074] [2024-09-18 16:33:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051241074] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:33:09,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:33:09,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 27 [2024-09-18 16:33:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106342489] [2024-09-18 16:33:09,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:33:09,583 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:33:09,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:33:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:33:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=573, Unknown=1, NotChecked=0, Total=702 [2024-09-18 16:33:09,585 INFO L87 Difference]: Start difference. First operand 298 states and 334 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-18 16:33:25,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 16:33:30,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:33:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:33:39,670 INFO L93 Difference]: Finished difference Result 424 states and 487 transitions. [2024-09-18 16:33:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-18 16:33:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 57 [2024-09-18 16:33:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:33:39,674 INFO L225 Difference]: With dead ends: 424 [2024-09-18 16:33:39,674 INFO L226 Difference]: Without dead ends: 422 [2024-09-18 16:33:39,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=304, Invalid=1101, Unknown=1, NotChecked=0, Total=1406 [2024-09-18 16:33:39,676 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:33:39,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 357 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2024-09-18 16:33:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-09-18 16:33:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 419. [2024-09-18 16:33:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 332 states have (on average 1.1355421686746987) internal successors, (377), 343 states have internal predecessors, (377), 51 states have call successors, (51), 36 states have call predecessors, (51), 35 states have return successors, (49), 39 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-18 16:33:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 477 transitions. [2024-09-18 16:33:39,796 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 477 transitions. Word has length 57 [2024-09-18 16:33:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:33:39,796 INFO L474 AbstractCegarLoop]: Abstraction has 419 states and 477 transitions. [2024-09-18 16:33:39,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-18 16:33:39,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:33:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 477 transitions. [2024-09-18 16:33:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-18 16:33:39,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:33:39,799 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:33:39,816 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 16:33:40,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:33:40,003 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:33:40,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:33:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1819634904, now seen corresponding path program 3 times [2024-09-18 16:33:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:33:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968803556] [2024-09-18 16:33:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:33:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:33:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:33:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676178099] [2024-09-18 16:33:40,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:33:40,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:33:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:33:40,081 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) [2024-09-18 16:33:40,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:33:40,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-18 16:33:40,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:33:40,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 16:33:40,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:33:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 121 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-18 16:33:47,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:34:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:34:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968803556] [2024-09-18 16:34:01,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:34:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676178099] [2024-09-18 16:34:01,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676178099] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:34:01,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:34:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-18 16:34:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767369882] [2024-09-18 16:34:01,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:34:01,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:34:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:34:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:34:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2024-09-18 16:34:01,708 INFO L87 Difference]: Start difference. First operand 419 states and 477 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 16:34:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:04,288 INFO L93 Difference]: Finished difference Result 655 states and 753 transitions. [2024-09-18 16:34:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:34:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 77 [2024-09-18 16:34:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:04,292 INFO L225 Difference]: With dead ends: 655 [2024-09-18 16:34:04,292 INFO L226 Difference]: Without dead ends: 653 [2024-09-18 16:34:04,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-09-18 16:34:04,293 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-18 16:34:04,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 344 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-18 16:34:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2024-09-18 16:34:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 209. [2024-09-18 16:34:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 165 states have internal predecessors, (186), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-18 16:34:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2024-09-18 16:34:04,443 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 77 [2024-09-18 16:34:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:04,443 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2024-09-18 16:34:04,444 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-18 16:34:04,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2024-09-18 16:34:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-18 16:34:04,445 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:04,445 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:04,459 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 16:34:04,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-18 16:34:04,646 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:04,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1188109524, now seen corresponding path program 2 times [2024-09-18 16:34:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:34:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913088370] [2024-09-18 16:34:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:34:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:34:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096494092] [2024-09-18 16:34:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:34:04,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:34:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:34:04,719 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) [2024-09-18 16:34:04,720 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:34:04,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:34:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:34:04,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 16:34:04,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:35,344 WARN L249 Executor]: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-09-18 16:34:35,345 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-09-18 16:34:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:34:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913088370] [2024-09-18 16:34:35,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:34:35,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096494092] [2024-09-18 16:34:35,345 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-09-18 16:34:35,359 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 16:34:35,546 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 16:34:35,547 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:327) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 44 more [2024-09-18 16:34:35,550 INFO L158 Benchmark]: Toolchain (without parser) took 121823.95ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 115.1MB in the beginning and 94.6MB in the end (delta: 20.6MB). Peak memory consumption was 62.4MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,551 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:34:35,551 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.34ms. Allocated memory is still 161.5MB. Free memory was 114.7MB in the beginning and 103.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,551 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.13ms. Allocated memory is still 161.5MB. Free memory was 103.6MB in the beginning and 102.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,551 INFO L158 Benchmark]: Boogie Preprocessor took 29.04ms. Allocated memory is still 161.5MB. Free memory was 102.5MB in the beginning and 100.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,551 INFO L158 Benchmark]: RCFGBuilder took 376.70ms. Allocated memory is still 161.5MB. Free memory was 100.9MB in the beginning and 125.7MB in the end (delta: -24.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,552 INFO L158 Benchmark]: TraceAbstraction took 121174.27ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 124.7MB in the beginning and 94.6MB in the end (delta: 30.1MB). Peak memory consumption was 75.1MB. Max. memory is 16.1GB. [2024-09-18 16:34:35,553 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 219.34ms. Allocated memory is still 161.5MB. Free memory was 114.7MB in the beginning and 103.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.13ms. Allocated memory is still 161.5MB. Free memory was 103.6MB in the beginning and 102.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.04ms. Allocated memory is still 161.5MB. Free memory was 102.5MB in the beginning and 100.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.70ms. Allocated memory is still 161.5MB. Free memory was 100.9MB in the beginning and 125.7MB in the end (delta: -24.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 121174.27ms. Allocated memory was 161.5MB in the beginning and 203.4MB in the end (delta: 41.9MB). Free memory was 124.7MB in the beginning and 94.6MB in the end (delta: 30.1MB). Peak memory consumption was 75.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/prodbin-ll_unwindbound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.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 d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 --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-de32597-m [2024-09-18 16:34:37,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:34:37,449 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-18 16:34:37,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:34:37,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:34:37,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:34:37,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:34:37,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:34:37,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:34:37,489 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:34:37,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:34:37,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:34:37,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:34:37,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:34:37,495 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:34:37,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:34:37,495 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:34:37,495 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:34:37,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:34:37,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:34:37,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:34:37,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:34:37,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:34:37,497 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-18 16:34:37,497 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-18 16:34:37,498 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:34:37,498 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-18 16:34:37,498 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:34:37,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:34:37,499 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:34:37,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:34:37,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:34:37,499 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:34:37,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:34:37,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:34:37,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:34:37,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:34:37,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:34:37,505 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-18 16:34:37,505 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-18 16:34:37,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:34:37,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:34:37,505 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:34:37,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:34:37,506 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-18 16:34:37,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d87fab1dc6e9b3b1ef38291e10411689fc961abba4e105f2586cc8da9615d8a6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:34:37,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:34:37,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:34:37,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:34:37,838 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:34:37,838 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:34:37,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-18 16:34:39,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:34:39,417 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:34:39,418 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-18 16:34:39,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b0a61d9ed/776fde5585724b59a2139c58cecd753c/FLAGc6e3ab4ae [2024-09-18 16:34:39,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b0a61d9ed/776fde5585724b59a2139c58cecd753c [2024-09-18 16:34:39,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:34:39,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:34:39,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:34:39,815 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:34:39,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:34:39,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:34:39" (1/1) ... [2024-09-18 16:34:39,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6cc65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:39, skipping insertion in model container [2024-09-18 16:34:39,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:34:39" (1/1) ... [2024-09-18 16:34:39,840 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:34:39,987 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/prodbin-ll_unwindbound100.c[1263,1276] [2024-09-18 16:34:40,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:34:40,028 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:34:40,047 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/prodbin-ll_unwindbound100.c[1263,1276] [2024-09-18 16:34:40,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:34:40,082 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:34:40,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40 WrapperNode [2024-09-18 16:34:40,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:34:40,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:34:40,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:34:40,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:34:40,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,110 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:34:40,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:34:40,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:34:40,112 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:34:40,112 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:34:40,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,135 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]. [2024-09-18 16:34:40,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,135 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,146 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:34:40,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:34:40,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:34:40,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:34:40,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (1/1) ... [2024-09-18 16:34:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:34:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:34:40,179 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) [2024-09-18 16:34:40,183 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 [2024-09-18 16:34:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:34:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-18 16:34:40,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:34:40,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:34:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:34:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:34:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:34:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:34:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:34:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:34:40,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:34:40,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:34:40,291 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:34:40,295 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:34:40,486 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:34:40,486 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:34:40,523 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:34:40,523 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:34:40,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:34:40 BoogieIcfgContainer [2024-09-18 16:34:40,523 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:34:40,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:34:40,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:34:40,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:34:40,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:34:39" (1/3) ... [2024-09-18 16:34:40,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6ede65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:34:40, skipping insertion in model container [2024-09-18 16:34:40,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:34:40" (2/3) ... [2024-09-18 16:34:40,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6ede65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:34:40, skipping insertion in model container [2024-09-18 16:34:40,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:34:40" (3/3) ... [2024-09-18 16:34:40,532 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2024-09-18 16:34:40,548 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:34:40,549 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:34:40,607 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:34:40,613 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;@650baf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:34:40,614 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:34:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:34:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 16:34:40,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:40,627 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:40,628 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:40,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-18 16:34:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683721568] [2024-09-18 16:34:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:40,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:40,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:40,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-18 16:34:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:34:40,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-18 16:34:40,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:40,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:34:40,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-18 16:34:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683721568] [2024-09-18 16:34:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683721568] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:34:40,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:34:40,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:34:40,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808853003] [2024-09-18 16:34:40,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:34:40,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:34:40,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-18 16:34:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:34:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:34:40,822 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:34:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:40,856 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-09-18 16:34:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:34:40,858 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-18 16:34:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:40,865 INFO L225 Difference]: With dead ends: 48 [2024-09-18 16:34:40,865 INFO L226 Difference]: Without dead ends: 24 [2024-09-18 16:34:40,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:34:40,873 INFO L434 NwaCegarLoop]: 29 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, 29 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 [2024-09-18 16:34:40,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:34:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-18 16:34:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-18 16:34:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:34:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-18 16:34:40,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-18 16:34:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:40,912 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-18 16:34:40,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:34:40,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:40,913 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-18 16:34:40,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:34:40,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:40,915 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:40,921 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-09-18 16:34:41,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:41,117 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:41,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:41,118 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-18 16:34:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:41,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939108375] [2024-09-18 16:34:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:41,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:41,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:41,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:41,125 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-09-18 16:34:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:34:41,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-18 16:34:41,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:41,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:34:41,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-18 16:34:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939108375] [2024-09-18 16:34:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939108375] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:34:41,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:34:41,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 16:34:41,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846624536] [2024-09-18 16:34:41,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:34:41,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 16:34:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-18 16:34:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 16:34:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 16:34:41,258 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:34:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:41,281 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-18 16:34:41,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 16:34:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-18 16:34:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:41,283 INFO L225 Difference]: With dead ends: 33 [2024-09-18 16:34:41,283 INFO L226 Difference]: Without dead ends: 26 [2024-09-18 16:34:41,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 16:34:41,285 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:34:41,286 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:34:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-18 16:34:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-18 16:34:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 16:34:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-18 16:34:41,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-18 16:34:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:41,303 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-18 16:34:41,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 16:34:41,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-18 16:34:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 16:34:41,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:41,304 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:41,314 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:34:41,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:41,514 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:41,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-18 16:34:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532330629] [2024-09-18 16:34:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:41,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:41,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:41,518 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-09-18 16:34:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:34:41,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 16:34:41,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:41,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:34:41,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-18 16:34:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532330629] [2024-09-18 16:34:41,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532330629] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:34:41,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:34:41,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:34:41,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961714146] [2024-09-18 16:34:41,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:34:41,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:34:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-18 16:34:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:34:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:34:41,917 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:34:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:42,311 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-09-18 16:34:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:34:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-18 16:34:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:42,312 INFO L225 Difference]: With dead ends: 36 [2024-09-18 16:34:42,312 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 16:34:42,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:34:42,314 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:34:42,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:34:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 16:34:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-09-18 16:34:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 16:34:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-18 16:34:42,323 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2024-09-18 16:34:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:42,323 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-18 16:34:42,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-18 16:34:42,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-18 16:34:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 16:34:42,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:42,325 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:42,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-09-18 16:34:42,525 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:42,526 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:42,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1056057055, now seen corresponding path program 1 times [2024-09-18 16:34:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622311501] [2024-09-18 16:34:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:42,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:42,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-09-18 16:34:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:34:42,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-18 16:34:42,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:42,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:34:42,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-18 16:34:42,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622311501] [2024-09-18 16:34:42,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622311501] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:34:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:34:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:34:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958056105] [2024-09-18 16:34:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:34:42,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:34:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-18 16:34:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:34:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:34:42,755 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:34:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:42,922 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-09-18 16:34:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:34:42,923 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-18 16:34:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:42,924 INFO L225 Difference]: With dead ends: 41 [2024-09-18 16:34:42,924 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 16:34:42,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:34:42,926 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:34:42,926 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:34:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 16:34:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-18 16:34:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 16:34:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-18 16:34:42,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2024-09-18 16:34:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:42,941 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-18 16:34:42,941 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 16:34:42,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-18 16:34:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:34:42,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:42,945 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:42,952 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-09-18 16:34:43,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:43,145 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-18 16:34:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441078209] [2024-09-18 16:34:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:43,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:43,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:43,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:43,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-09-18 16:34:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:34:43,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:34:43,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:34:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:43,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:34:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:34:43,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-18 16:34:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441078209] [2024-09-18 16:34:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441078209] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:34:43,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:34:43,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-09-18 16:34:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982345798] [2024-09-18 16:34:43,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:34:43,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:34:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-18 16:34:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:34:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:34:43,455 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-18 16:34:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:34:44,222 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-18 16:34:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 16:34:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2024-09-18 16:34:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:34:44,224 INFO L225 Difference]: With dead ends: 69 [2024-09-18 16:34:44,225 INFO L226 Difference]: Without dead ends: 62 [2024-09-18 16:34:44,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-09-18 16:34:44,230 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 16:34:44,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 16:34:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-18 16:34:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-18 16:34:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-18 16:34:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-18 16:34:44,260 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-18 16:34:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:34:44,260 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-18 16:34:44,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-18 16:34:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-18 16:34:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 16:34:44,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:34:44,264 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:34:44,272 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-09-18 16:34:44,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:44,465 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:34:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:34:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-18 16:34:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-18 16:34:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504835005] [2024-09-18 16:34:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:34:44,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-18 16:34:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-18 16:34:44,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-18 16:34:44,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process