./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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:18:54,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:18:54,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:18:54,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:18:54,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:18:54,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:18:54,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:18:54,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:18:54,439 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:18:54,439 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:18:54,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:18:54,440 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:18:54,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:18:54,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:18:54,441 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:18:54,441 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:18:54,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:18:54,441 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:18:54,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:18:54,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:18:54,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:18:54,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:18:54,444 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:18:54,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:18:54,444 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:18:54,445 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:18:54,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:18:54,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:18:54,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:18:54,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:18:54,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:18:54,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:18:54,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:18:54,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:18:54,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:18:54,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:18:54,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:18:54,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:18:54,449 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:18:54,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:18:54,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:18:54,450 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:18:54,450 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 11:18:54,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:18:54,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:18:54,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:18:54,733 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:18:54,733 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:18:54,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-25 11:18:55,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:18:56,112 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:18:56,112 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-25 11:18:56,120 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/918da634f/bfce174f114e41a4856691227fe2e7b9/FLAG1a4360c0b [2024-09-25 11:18:56,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/918da634f/bfce174f114e41a4856691227fe2e7b9 [2024-09-25 11:18:56,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:18:56,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:18:56,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:18:56,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:18:56,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:18:56,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5676a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56, skipping insertion in model container [2024-09-25 11:18:56,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:18:56,272 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] [2024-09-25 11:18:56,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:18:56,304 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:18:56,312 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] [2024-09-25 11:18:56,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:18:56,330 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:18:56,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56 WrapperNode [2024-09-25 11:18:56,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:18:56,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:18:56,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:18:56,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:18:56,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,346 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:18:56,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:18:56,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:18:56,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:18:56,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:18:56,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,356 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,368 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]. [2024-09-25 11:18:56,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,374 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:18:56,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:18:56,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:18:56,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:18:56,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (1/1) ... [2024-09-25 11:18:56,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:18:56,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:18:56,413 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) [2024-09-25 11:18:56,416 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 [2024-09-25 11:18:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:18:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:18:56,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:18:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:18:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:18:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:18:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:18:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:18:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:18:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:18:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:18:56,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:18:56,507 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:18:56,508 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:18:56,624 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 11:18:56,624 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:18:56,641 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:18:56,641 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:18:56,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:18:56 BoogieIcfgContainer [2024-09-25 11:18:56,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:18:56,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:18:56,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:18:56,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:18:56,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:18:56" (1/3) ... [2024-09-25 11:18:56,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5777c63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:18:56, skipping insertion in model container [2024-09-25 11:18:56,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:18:56" (2/3) ... [2024-09-25 11:18:56,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5777c63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:18:56, skipping insertion in model container [2024-09-25 11:18:56,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:18:56" (3/3) ... [2024-09-25 11:18:56,648 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2024-09-25 11:18:56,660 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:18:56,660 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:18:56,709 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:18:56,715 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;@44960f34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:18:56,715 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:18:56,718 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) [2024-09-25 11:18:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 11:18:56,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:56,724 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:18:56,724 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:18:56,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-25 11:18:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:18:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536895940] [2024-09-25 11:18:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:18:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:56,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:18:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:56,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:18:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:18:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536895940] [2024-09-25 11:18:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536895940] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:18:56,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:18:56,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 11:18:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273774453] [2024-09-25 11:18:56,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:18:56,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 11:18:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:18:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 11:18:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 11:18:56,906 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) [2024-09-25 11:18:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:18:56,970 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-09-25 11:18:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 11:18:56,972 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 [2024-09-25 11:18:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:18:56,977 INFO L225 Difference]: With dead ends: 49 [2024-09-25 11:18:56,977 INFO L226 Difference]: Without dead ends: 25 [2024-09-25 11:18:56,979 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 [2024-09-25 11:18:56,983 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:18:56,984 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:18:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-25 11:18:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-25 11:18:57,013 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) [2024-09-25 11:18:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-25 11:18:57,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-25 11:18:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:18:57,016 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-25 11:18:57,018 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) [2024-09-25 11:18:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-25 11:18:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:18:57,019 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:57,019 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:18:57,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:18:57,020 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:18:57,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-25 11:18:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:18:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704169974] [2024-09-25 11:18:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:18:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:18:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:18:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:18:57,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704169974] [2024-09-25 11:18:57,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704169974] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:18:57,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:18:57,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:18:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454125710] [2024-09-25 11:18:57,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:18:57,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:18:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:18:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:18:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:18:57,186 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) [2024-09-25 11:18:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:18:57,250 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-25 11:18:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 11:18:57,251 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 [2024-09-25 11:18:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:18:57,251 INFO L225 Difference]: With dead ends: 33 [2024-09-25 11:18:57,252 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 11:18:57,252 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 [2024-09-25 11:18:57,253 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:18:57,253 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:18:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 11:18:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-25 11:18:57,258 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) [2024-09-25 11:18:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-25 11:18:57,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-25 11:18:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:18:57,261 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-25 11:18:57,261 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) [2024-09-25 11:18:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-25 11:18:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:18:57,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:57,262 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:18:57,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 11:18:57,262 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:18:57,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-25 11:18:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:18:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878246081] [2024-09-25 11:18:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:18:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:18:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749496025] [2024-09-25 11:18:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:57,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:18:57,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:18:57,292 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) [2024-09-25 11:18:57,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 11:18:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 11:18:57,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:18:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:57,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:18:57,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:18:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878246081] [2024-09-25 11:18:57,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:18:57,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749496025] [2024-09-25 11:18:57,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749496025] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:18:57,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:18:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 11:18:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84225348] [2024-09-25 11:18:57,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:18:57,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:18:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:18:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:18:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:18:57,490 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) [2024-09-25 11:18:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:18:57,582 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-09-25 11:18:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:18:57,582 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 [2024-09-25 11:18:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:18:57,583 INFO L225 Difference]: With dead ends: 41 [2024-09-25 11:18:57,584 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 11:18:57,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-25 11:18:57,586 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 [2024-09-25 11:18:57,587 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] [2024-09-25 11:18:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 11:18:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-25 11:18:57,598 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) [2024-09-25 11:18:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-25 11:18:57,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2024-09-25 11:18:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:18:57,600 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-25 11:18:57,600 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) [2024-09-25 11:18:57,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-25 11:18:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:18:57,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:57,602 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] [2024-09-25 11:18:57,614 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:18:57,802 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 [2024-09-25 11:18:57,803 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:18:57,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-25 11:18:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:18:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214115145] [2024-09-25 11:18:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:57,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:18:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:18:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:18:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 11:18:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:18:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214115145] [2024-09-25 11:18:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214115145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:18:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598592077] [2024-09-25 11:18:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:18:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:18:57,920 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) [2024-09-25 11:18:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 11:18:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:57,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 11:18:57,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:18:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:58,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:18:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:58,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598592077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:18:58,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:18:58,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-25 11:18:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442353965] [2024-09-25 11:18:58,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:18:58,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:18:58,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:18:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:18:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:18:58,070 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) [2024-09-25 11:18:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:18:58,218 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-25 11:18:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 11:18:58,218 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 [2024-09-25 11:18:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:18:58,219 INFO L225 Difference]: With dead ends: 69 [2024-09-25 11:18:58,219 INFO L226 Difference]: Without dead ends: 62 [2024-09-25 11:18:58,220 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 [2024-09-25 11:18:58,220 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 [2024-09-25 11:18:58,221 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] [2024-09-25 11:18:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-25 11:18:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-25 11:18:58,234 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) [2024-09-25 11:18:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-25 11:18:58,235 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-25 11:18:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:18:58,237 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-25 11:18:58,237 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) [2024-09-25 11:18:58,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-25 11:18:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:18:58,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:58,239 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] [2024-09-25 11:18:58,251 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 11:18:58,442 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 [2024-09-25 11:18:58,443 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:18:58,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-25 11:18:58,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:18:58,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551405221] [2024-09-25 11:18:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:58,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:18:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:18:58,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078564094] [2024-09-25 11:18:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:18:58,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:18:58,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:18:58,476 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) [2024-09-25 11:18:58,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 11:18:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:18:58,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-25 11:18:58,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:18:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:58,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:18:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:18:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:18:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551405221] [2024-09-25 11:18:59,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:18:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078564094] [2024-09-25 11:18:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078564094] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:18:59,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:18:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-25 11:18:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252721197] [2024-09-25 11:18:59,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:18:59,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 11:18:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:18:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 11:18:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-25 11:18:59,657 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) [2024-09-25 11:18:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:18:59,946 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2024-09-25 11:18:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 11:18:59,947 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 [2024-09-25 11:18:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:18:59,950 INFO L225 Difference]: With dead ends: 91 [2024-09-25 11:18:59,950 INFO L226 Difference]: Without dead ends: 89 [2024-09-25 11:18:59,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:18:59,951 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 11:18:59,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 173 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 11:18:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-25 11:18:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-25 11:18:59,972 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) [2024-09-25 11:18:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-09-25 11:18:59,976 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2024-09-25 11:18:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:18:59,976 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-09-25 11:18:59,976 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) [2024-09-25 11:18:59,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:18:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-09-25 11:18:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:18:59,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:18:59,977 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] [2024-09-25 11:18:59,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 11:19:00,182 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 [2024-09-25 11:19:00,183 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:00,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1898211220, now seen corresponding path program 1 times [2024-09-25 11:19:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373201208] [2024-09-25 11:19:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:19:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994034008] [2024-09-25 11:19:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:00,200 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) [2024-09-25 11:19:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 11:19:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:00,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 11:19:00,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:19:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:19:00,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:19:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:19:00,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:19:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373201208] [2024-09-25 11:19:00,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:19:00,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994034008] [2024-09-25 11:19:00,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994034008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:19:00,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:19:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-25 11:19:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435505765] [2024-09-25 11:19:00,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:19:00,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 11:19:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:19:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 11:19:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-25 11:19:00,742 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) [2024-09-25 11:19:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:19:01,100 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2024-09-25 11:19:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:19:01,100 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 [2024-09-25 11:19:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:19:01,102 INFO L225 Difference]: With dead ends: 138 [2024-09-25 11:19:01,102 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 11:19:01,102 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:19:01,103 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-25 11:19:01,103 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] [2024-09-25 11:19:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 11:19:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-25 11:19:01,122 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) [2024-09-25 11:19:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2024-09-25 11:19:01,124 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 27 [2024-09-25 11:19:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:19:01,124 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2024-09-25 11:19:01,124 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) [2024-09-25 11:19:01,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2024-09-25 11:19:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 11:19:01,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:19:01,126 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] [2024-09-25 11:19:01,138 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 11:19:01,329 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 [2024-09-25 11:19:01,330 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:01,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2085342267, now seen corresponding path program 1 times [2024-09-25 11:19:01,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:01,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267178896] [2024-09-25 11:19:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:01,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:19:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520070497] [2024-09-25 11:19:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:01,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:01,349 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) [2024-09-25 11:19:01,350 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 11:19:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:01,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 11:19:01,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:19:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:19:01,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:19:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 11:19:01,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:19:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267178896] [2024-09-25 11:19:01,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:19:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520070497] [2024-09-25 11:19:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520070497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:19:01,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:19:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-25 11:19:01,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624397935] [2024-09-25 11:19:01,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:19:01,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 11:19:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:19:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 11:19:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:19:01,506 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) [2024-09-25 11:19:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:19:01,603 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2024-09-25 11:19:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:19:01,606 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 [2024-09-25 11:19:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:19:01,606 INFO L225 Difference]: With dead ends: 99 [2024-09-25 11:19:01,606 INFO L226 Difference]: Without dead ends: 89 [2024-09-25 11:19:01,607 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 [2024-09-25 11:19:01,607 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 [2024-09-25 11:19:01,607 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] [2024-09-25 11:19:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-25 11:19:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-25 11:19:01,629 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) [2024-09-25 11:19:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-09-25 11:19:01,630 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 33 [2024-09-25 11:19:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:19:01,632 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-09-25 11:19:01,632 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) [2024-09-25 11:19:01,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-09-25 11:19:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 11:19:01,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:19:01,634 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] [2024-09-25 11:19:01,651 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 11:19:01,835 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 [2024-09-25 11:19:01,836 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:01,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash -134747104, now seen corresponding path program 1 times [2024-09-25 11:19:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555893538] [2024-09-25 11:19:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:19:01,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797740816] [2024-09-25 11:19:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:01,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:01,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:01,880 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) [2024-09-25 11:19:01,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 11:19:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:01,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-25 11:19:01,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:19:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 11:19:02,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:19:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-25 11:19:03,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:19:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555893538] [2024-09-25 11:19:03,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:19:03,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797740816] [2024-09-25 11:19:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797740816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:19:03,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:19:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2024-09-25 11:19:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587013706] [2024-09-25 11:19:03,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:19:03,483 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 11:19:03,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:19:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 11:19:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-09-25 11:19:03,484 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) [2024-09-25 11:19:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:19:05,007 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-09-25 11:19:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 11:19:05,007 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 [2024-09-25 11:19:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:19:05,008 INFO L225 Difference]: With dead ends: 141 [2024-09-25 11:19:05,009 INFO L226 Difference]: Without dead ends: 139 [2024-09-25 11:19:05,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:19:05,009 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 11:19:05,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 316 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 11:19:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-25 11:19:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-25 11:19:05,040 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) [2024-09-25 11:19:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2024-09-25 11:19:05,041 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 47 [2024-09-25 11:19:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:19:05,041 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2024-09-25 11:19:05,041 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) [2024-09-25 11:19:05,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2024-09-25 11:19:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-25 11:19:05,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:19:05,043 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] [2024-09-25 11:19:05,055 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 11:19:05,243 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 [2024-09-25 11:19:05,244 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:05,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2108223176, now seen corresponding path program 2 times [2024-09-25 11:19:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742624653] [2024-09-25 11:19:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:19:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:19:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 11:19:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:19:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:19:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 11:19:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:19:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:19:05,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:19:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742624653] [2024-09-25 11:19:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742624653] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:19:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199554846] [2024-09-25 11:19:05,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:19:05,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:05,478 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) [2024-09-25 11:19:05,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 11:19:05,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:19:05,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:19:05,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 11:19:05,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:19:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:19:05,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:19:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 11:19:05,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199554846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:19:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:19:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-25 11:19:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785230530] [2024-09-25 11:19:05,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:19:05,680 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 11:19:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:19:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 11:19:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-25 11:19:05,682 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) [2024-09-25 11:19:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:19:05,991 INFO L93 Difference]: Finished difference Result 315 states and 366 transitions. [2024-09-25 11:19:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 11:19:05,992 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 [2024-09-25 11:19:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:19:05,993 INFO L225 Difference]: With dead ends: 315 [2024-09-25 11:19:05,994 INFO L226 Difference]: Without dead ends: 308 [2024-09-25 11:19:05,994 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 [2024-09-25 11:19:05,995 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 [2024-09-25 11:19:05,995 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] [2024-09-25 11:19:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-09-25 11:19:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2024-09-25 11:19:06,051 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) [2024-09-25 11:19:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 334 transitions. [2024-09-25 11:19:06,054 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 334 transitions. Word has length 57 [2024-09-25 11:19:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:19:06,054 INFO L474 AbstractCegarLoop]: Abstraction has 298 states and 334 transitions. [2024-09-25 11:19:06,054 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) [2024-09-25 11:19:06,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 334 transitions. [2024-09-25 11:19:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-25 11:19:06,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:19:06,057 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] [2024-09-25 11:19:06,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 11:19:06,257 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 [2024-09-25 11:19:06,257 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1644319050, now seen corresponding path program 2 times [2024-09-25 11:19:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459599834] [2024-09-25 11:19:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:19:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763801351] [2024-09-25 11:19:06,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:19:06,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:06,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:06,280 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) [2024-09-25 11:19:06,281 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 11:19:06,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:19:06,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:19:06,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-25 11:19:06,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:19:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:19:08,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:19:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 11:19:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:19:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459599834] [2024-09-25 11:19:29,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:19:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763801351] [2024-09-25 11:19:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763801351] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:19:29,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:19:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 27 [2024-09-25 11:19:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204911401] [2024-09-25 11:19:29,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:19:29,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 11:19:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:19:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 11:19:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=573, Unknown=1, NotChecked=0, Total=702 [2024-09-25 11:19:29,415 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) [2024-09-25 11:19:45,683 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 [] [2024-09-25 11:19:49,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-25 11:19:59,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:19:59,308 INFO L93 Difference]: Finished difference Result 424 states and 487 transitions. [2024-09-25 11:19:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 11:19:59,308 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 [2024-09-25 11:19:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:19:59,311 INFO L225 Difference]: With dead ends: 424 [2024-09-25 11:19:59,311 INFO L226 Difference]: Without dead ends: 422 [2024-09-25 11:19:59,312 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 [2024-09-25 11:19:59,312 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s 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, 13.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:19:59,312 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 357 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2024-09-25 11:19:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-09-25 11:19:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 419. [2024-09-25 11:19:59,424 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) [2024-09-25 11:19:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 477 transitions. [2024-09-25 11:19:59,426 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 477 transitions. Word has length 57 [2024-09-25 11:19:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:19:59,426 INFO L474 AbstractCegarLoop]: Abstraction has 419 states and 477 transitions. [2024-09-25 11:19:59,426 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) [2024-09-25 11:19:59,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 477 transitions. [2024-09-25 11:19:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-25 11:19:59,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:19:59,427 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] [2024-09-25 11:19:59,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 11:19:59,628 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 [2024-09-25 11:19:59,628 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:19:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:19:59,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1819634904, now seen corresponding path program 3 times [2024-09-25 11:19:59,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:19:59,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138947277] [2024-09-25 11:19:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:19:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:19:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:19:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875714232] [2024-09-25 11:19:59,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:19:59,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:19:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:19:59,683 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) [2024-09-25 11:19:59,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 11:19:59,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-25 11:19:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:19:59,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-25 11:19:59,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 121 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-25 11:20:06,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:20:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:20:20,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138947277] [2024-09-25 11:20:20,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:20:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875714232] [2024-09-25 11:20:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875714232] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:20:20,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:20:20,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 11:20:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21672918] [2024-09-25 11:20:20,605 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 11:20:20,605 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 11:20:20,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:20:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 11:20:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2024-09-25 11:20:20,606 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) [2024-09-25 11:20:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:20:23,138 INFO L93 Difference]: Finished difference Result 655 states and 753 transitions. [2024-09-25 11:20:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:20:23,139 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 [2024-09-25 11:20:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:20:23,142 INFO L225 Difference]: With dead ends: 655 [2024-09-25 11:20:23,142 INFO L226 Difference]: Without dead ends: 653 [2024-09-25 11:20:23,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-09-25 11:20:23,144 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, 1.4s IncrementalHoareTripleChecker+Time [2024-09-25 11:20:23,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 344 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-25 11:20:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2024-09-25 11:20:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 209. [2024-09-25 11:20:23,259 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) [2024-09-25 11:20:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2024-09-25 11:20:23,260 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 77 [2024-09-25 11:20:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:20:23,260 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2024-09-25 11:20:23,260 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) [2024-09-25 11:20:23,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2024-09-25 11:20:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-25 11:20:23,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:23,262 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] [2024-09-25 11:20:23,275 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 11:20:23,462 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 [2024-09-25 11:20:23,463 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:23,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1188109524, now seen corresponding path program 2 times [2024-09-25 11:20:23,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:20:23,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552881716] [2024-09-25 11:20:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:20:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:20:23,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541391096] [2024-09-25 11:20:23,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:20:23,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:20:23,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:20:23,507 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) [2024-09-25 11:20:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 11:20:23,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:20:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:20:23,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-25 11:20:23,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:52,665 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 [2024-09-25 11:20:52,665 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") [2024-09-25 11:20:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:20:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552881716] [2024-09-25 11:20:52,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:20:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541391096] [2024-09-25 11:20:52,667 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-09-25 11:20:52,680 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 11:20:52,868 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 [2024-09-25 11:20:52,869 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 [2024-09-25 11:20:52,872 INFO L158 Benchmark]: Toolchain (without parser) took 116737.79ms. Allocated memory was 81.8MB in the beginning and 180.4MB in the end (delta: 98.6MB). Free memory was 50.8MB in the beginning and 148.8MB in the end (delta: -98.0MB). Peak memory consumption was 102.9MB. Max. memory is 16.1GB. [2024-09-25 11:20:52,872 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 60.8MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 11:20:52,872 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.50ms. Allocated memory is still 81.8MB. Free memory was 50.6MB in the beginning and 59.0MB in the end (delta: -8.4MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2024-09-25 11:20:52,872 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.61ms. Allocated memory is still 81.8MB. Free memory was 59.0MB in the beginning and 58.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 11:20:52,872 INFO L158 Benchmark]: Boogie Preprocessor took 33.00ms. Allocated memory is still 81.8MB. Free memory was 58.0MB in the beginning and 56.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 11:20:52,872 INFO L158 Benchmark]: RCFGBuilder took 260.29ms. Allocated memory is still 81.8MB. Free memory was 56.2MB in the beginning and 44.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-25 11:20:52,873 INFO L158 Benchmark]: TraceAbstraction took 116228.13ms. Allocated memory was 81.8MB in the beginning and 180.4MB in the end (delta: 98.6MB). Free memory was 43.3MB in the beginning and 148.8MB in the end (delta: -105.5MB). Peak memory consumption was 95.5MB. Max. memory is 16.1GB. [2024-09-25 11:20:52,873 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 60.8MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.50ms. Allocated memory is still 81.8MB. Free memory was 50.6MB in the beginning and 59.0MB in the end (delta: -8.4MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.61ms. Allocated memory is still 81.8MB. Free memory was 59.0MB in the beginning and 58.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.00ms. Allocated memory is still 81.8MB. Free memory was 58.0MB in the beginning and 56.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 260.29ms. Allocated memory is still 81.8MB. Free memory was 56.2MB in the beginning and 44.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 116228.13ms. Allocated memory was 81.8MB in the beginning and 180.4MB in the end (delta: 98.6MB). Free memory was 43.3MB in the beginning and 148.8MB in the end (delta: -105.5MB). Peak memory consumption was 95.5MB. 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/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-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 --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:20:54,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:20:54,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-25 11:20:54,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:20:54,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:20:54,427 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:20:54,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:20:54,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:20:54,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:20:54,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:20:54,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:20:54,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:20:54,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:20:54,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:20:54,432 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:20:54,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:20:54,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:20:54,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:20:54,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:20:54,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:20:54,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:20:54,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:20:54,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:20:54,438 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-25 11:20:54,439 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-25 11:20:54,439 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:20:54,439 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-25 11:20:54,439 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:20:54,439 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:20:54,441 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:20:54,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:20:54,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:20:54,442 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:20:54,442 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:20:54,443 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-25 11:20:54,443 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 11:20:54,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:20:54,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:20:54,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:20:54,687 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:20:54,687 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:20:54,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-25 11:20:55,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:20:56,054 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:20:56,055 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2024-09-25 11:20:56,064 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ce409aef1/c61b3ab8660244a687219242dafdf756/FLAG40f56c405 [2024-09-25 11:20:56,474 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ce409aef1/c61b3ab8660244a687219242dafdf756 [2024-09-25 11:20:56,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:20:56,477 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:20:56,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:20:56,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:20:56,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:20:56,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2a5e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56, skipping insertion in model container [2024-09-25 11:20:56,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,496 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:20:56,618 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] [2024-09-25 11:20:56,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:20:56,645 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:20:56,653 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] [2024-09-25 11:20:56,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:20:56,672 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:20:56,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56 WrapperNode [2024-09-25 11:20:56,672 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:20:56,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:20:56,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:20:56,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:20:56,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,689 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:20:56,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:20:56,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:20:56,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:20:56,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:20:56,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,709 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,721 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]. [2024-09-25 11:20:56,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,721 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,731 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,736 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:20:56,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:20:56,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:20:56,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:20:56,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (1/1) ... [2024-09-25 11:20:56,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:20:56,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:20:56,771 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) [2024-09-25 11:20:56,775 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 [2024-09-25 11:20:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:20:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-25 11:20:56,809 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:20:56,809 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:20:56,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:20:56,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:20:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:20:56,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:20:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:20:56,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:20:56,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:20:56,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:20:56,863 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:20:56,865 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:20:56,985 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 11:20:56,985 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:20:57,006 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:20:57,006 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:20:57,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:20:57 BoogieIcfgContainer [2024-09-25 11:20:57,007 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:20:57,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:20:57,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:20:57,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:20:57,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:20:56" (1/3) ... [2024-09-25 11:20:57,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792990fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:20:57, skipping insertion in model container [2024-09-25 11:20:57,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:20:56" (2/3) ... [2024-09-25 11:20:57,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792990fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:20:57, skipping insertion in model container [2024-09-25 11:20:57,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:20:57" (3/3) ... [2024-09-25 11:20:57,012 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2024-09-25 11:20:57,023 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:20:57,023 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:20:57,074 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:20:57,078 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;@6c3b3859, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:20:57,078 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:20:57,081 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) [2024-09-25 11:20:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 11:20:57,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:57,085 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:20:57,086 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-25 11:20:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:20:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476992093] [2024-09-25 11:20:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:57,098 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 [2024-09-25 11:20:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:20:57,101 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) [2024-09-25 11:20:57,102 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 [2024-09-25 11:20:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:20:57,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-25 11:20:57,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:57,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:20:57,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:20:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476992093] [2024-09-25 11:20:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476992093] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:20:57,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:20:57,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:20:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504666086] [2024-09-25 11:20:57,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:20:57,177 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:20:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:20:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:20:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:20:57,194 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) [2024-09-25 11:20:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:20:57,212 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-09-25 11:20:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:20:57,214 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 [2024-09-25 11:20:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:20:57,218 INFO L225 Difference]: With dead ends: 48 [2024-09-25 11:20:57,218 INFO L226 Difference]: Without dead ends: 24 [2024-09-25 11:20:57,221 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 [2024-09-25 11:20:57,224 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 [2024-09-25 11:20:57,225 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] [2024-09-25 11:20:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-25 11:20:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-25 11:20:57,248 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) [2024-09-25 11:20:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-25 11:20:57,250 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-25 11:20:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:20:57,250 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-25 11:20:57,250 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) [2024-09-25 11:20:57,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-25 11:20:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:20:57,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:57,253 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:20:57,258 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 (2)] Forceful destruction successful, exit code 0 [2024-09-25 11:20:57,453 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 [2024-09-25 11:20:57,454 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-25 11:20:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:20:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113669589] [2024-09-25 11:20:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:57,457 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 [2024-09-25 11:20:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:20:57,459 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) [2024-09-25 11:20:57,460 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 [2024-09-25 11:20:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:20:57,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-25 11:20:57,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:57,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:20:57,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:20:57,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113669589] [2024-09-25 11:20:57,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113669589] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:20:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:20:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-25 11:20:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956039102] [2024-09-25 11:20:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:20:57,563 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-25 11:20:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:20:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-25 11:20:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-25 11:20:57,567 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) [2024-09-25 11:20:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:20:57,588 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-25 11:20:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 11:20:57,588 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 [2024-09-25 11:20:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:20:57,589 INFO L225 Difference]: With dead ends: 33 [2024-09-25 11:20:57,590 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 11:20:57,590 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 [2024-09-25 11:20:57,591 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 [2024-09-25 11:20:57,591 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] [2024-09-25 11:20:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 11:20:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-25 11:20:57,596 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) [2024-09-25 11:20:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-25 11:20:57,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-25 11:20:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:20:57,597 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-25 11:20:57,597 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) [2024-09-25 11:20:57,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-25 11:20:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 11:20:57,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:57,598 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:20:57,604 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 (3)] Ended with exit code 0 [2024-09-25 11:20:57,799 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 [2024-09-25 11:20:57,799 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:57,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-25 11:20:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:20:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317443088] [2024-09-25 11:20:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:57,800 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 [2024-09-25 11:20:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:20:57,802 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) [2024-09-25 11:20:57,804 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 [2024-09-25 11:20:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:20:58,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 11:20:58,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:58,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:20:58,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:20:58,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317443088] [2024-09-25 11:20:58,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317443088] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:20:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:20:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:20:58,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222409798] [2024-09-25 11:20:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:20:58,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:20:58,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:20:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:20:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:20:58,147 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) [2024-09-25 11:20:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:20:58,468 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-09-25 11:20:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:20:58,468 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 [2024-09-25 11:20:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:20:58,470 INFO L225 Difference]: With dead ends: 36 [2024-09-25 11:20:58,471 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 11:20:58,472 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 [2024-09-25 11:20:58,472 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:20:58,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:20:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 11:20:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-09-25 11:20:58,483 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) [2024-09-25 11:20:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-25 11:20:58,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2024-09-25 11:20:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:20:58,485 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-25 11:20:58,485 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) [2024-09-25 11:20:58,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-25 11:20:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-25 11:20:58,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:58,487 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] [2024-09-25 11:20:58,492 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 (4)] Forceful destruction successful, exit code 0 [2024-09-25 11:20:58,688 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 [2024-09-25 11:20:58,688 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:58,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1056057055, now seen corresponding path program 1 times [2024-09-25 11:20:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:20:58,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620180224] [2024-09-25 11:20:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:58,689 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 [2024-09-25 11:20:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:20:58,690 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) [2024-09-25 11:20:58,691 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 [2024-09-25 11:20:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:20:58,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-25 11:20:58,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:58,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:20:58,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:20:58,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620180224] [2024-09-25 11:20:58,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620180224] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:20:58,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:20:58,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 11:20:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627462853] [2024-09-25 11:20:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:20:58,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 11:20:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:20:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 11:20:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:20:58,846 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) [2024-09-25 11:20:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:20:58,979 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-09-25 11:20:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 11:20:58,979 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 [2024-09-25 11:20:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:20:58,980 INFO L225 Difference]: With dead ends: 41 [2024-09-25 11:20:58,980 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 11:20:58,980 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:20:58,981 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 [2024-09-25 11:20:58,981 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] [2024-09-25 11:20:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 11:20:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-25 11:20:58,989 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) [2024-09-25 11:20:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-25 11:20:58,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2024-09-25 11:20:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:20:58,990 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-25 11:20:58,990 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) [2024-09-25 11:20:58,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-25 11:20:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:20:58,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:20:58,991 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] [2024-09-25 11:20:58,998 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 [2024-09-25 11:20:59,191 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 [2024-09-25 11:20:59,192 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:20:59,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:20:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-25 11:20:59,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:20:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218835447] [2024-09-25 11:20:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:20:59,193 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 [2024-09-25 11:20:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:20:59,195 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) [2024-09-25 11:20:59,196 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 [2024-09-25 11:20:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:20:59,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 11:20:59,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:20:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:59,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:20:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 11:20:59,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:20:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218835447] [2024-09-25 11:20:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218835447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:20:59,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:20:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-09-25 11:20:59,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285502401] [2024-09-25 11:20:59,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:20:59,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 11:20:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:20:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 11:20:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:20:59,486 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) [2024-09-25 11:21:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:21:00,261 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-25 11:21:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 11:21:00,262 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 [2024-09-25 11:21:00,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:21:00,263 INFO L225 Difference]: With dead ends: 69 [2024-09-25 11:21:00,263 INFO L226 Difference]: Without dead ends: 62 [2024-09-25 11:21:00,264 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 [2024-09-25 11:21:00,264 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 [2024-09-25 11:21:00,265 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] [2024-09-25 11:21:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-25 11:21:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-25 11:21:00,276 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) [2024-09-25 11:21:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-25 11:21:00,277 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-25 11:21:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:21:00,277 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-25 11:21:00,278 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) [2024-09-25 11:21:00,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:21:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-25 11:21:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:21:00,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:21:00,279 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] [2024-09-25 11:21:00,285 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 [2024-09-25 11:21:00,479 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 [2024-09-25 11:21:00,480 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:21:00,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:21:00,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-25 11:21:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:21:00,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503698831] [2024-09-25 11:21:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:21:00,481 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 [2024-09-25 11:21:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:21:00,482 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) [2024-09-25 11:21:00,489 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