./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --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/loop-invgen/seq-3.i -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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --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 10:23:00,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:23:00,953 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:23:00,959 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:23:00,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:23:00,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:23:00,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:23:00,990 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:23:00,991 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:23:00,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:23:00,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:23:00,995 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:23:00,996 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:23:00,996 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:23:00,996 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:23:00,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:23:00,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:23:00,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:23:00,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:23:00,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:23:00,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:23:01,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:23:01,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:23:01,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:23:01,000 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:23:01,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:23:01,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:23:01,001 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:23:01,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:23:01,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:23:01,002 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:23:01,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:23:01,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:23:01,003 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:23:01,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:23:01,005 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:23:01,006 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:23:01,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:23:01,006 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:23:01,006 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:23:01,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:23:01,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:23:01,007 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 -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 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 10:23:01,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:23:01,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:23:01,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:23:01,380 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:23:01,380 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:23:01,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-25 10:23:02,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:23:02,976 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-09-25 10:23:03,149 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:23:03,150 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-25 10:23:03,161 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4127ccef7/e4fdd72af348471280cdf6a453cb54b1/FLAGd293a1055 [2024-09-25 10:23:03,179 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4127ccef7/e4fdd72af348471280cdf6a453cb54b1 [2024-09-25 10:23:03,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:23:03,185 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:23:03,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:23:03,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:23:03,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:23:03,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aef6ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03, skipping insertion in model container [2024-09-25 10:23:03,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:23:03,403 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-25 10:23:03,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:23:03,435 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:23:03,446 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-25 10:23:03,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:23:03,475 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:23:03,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03 WrapperNode [2024-09-25 10:23:03,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:23:03,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:23:03,478 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:23:03,478 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:23:03,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,493 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,505 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:23:03,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:23:03,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:23:03,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:23:03,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:23:03,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,535 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 10:23:03,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,542 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:23:03,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:23:03,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:23:03,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:23:03,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (1/1) ... [2024-09-25 10:23:03,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:23:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:03,590 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 10:23:03,593 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 10:23:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:23:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:23:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:23:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:23:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:23:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:23:03,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:23:03,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:23:03,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:23:03,709 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:23:03,711 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:23:03,872 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 10:23:03,874 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:23:03,895 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:23:03,895 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-25 10:23:03,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:23:03 BoogieIcfgContainer [2024-09-25 10:23:03,896 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:23:03,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:23:03,900 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:23:03,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:23:03,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:23:03" (1/3) ... [2024-09-25 10:23:03,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c51d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:23:03, skipping insertion in model container [2024-09-25 10:23:03,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:23:03" (2/3) ... [2024-09-25 10:23:03,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c51d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:23:03, skipping insertion in model container [2024-09-25 10:23:03,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:23:03" (3/3) ... [2024-09-25 10:23:03,908 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2024-09-25 10:23:03,925 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:23:03,926 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:23:03,987 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:23:03,996 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;@77494336, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:23:03,997 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:23:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 10:23:04,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:04,008 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:04,009 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:04,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 961061654, now seen corresponding path program 1 times [2024-09-25 10:23:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:04,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644077669] [2024-09-25 10:23:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,440 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 10:23:04,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644077669] [2024-09-25 10:23:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644077669] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:23:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:23:04,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 10:23:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400657456] [2024-09-25 10:23:04,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:23:04,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:23:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:23:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:23:04,479 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:23:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:04,615 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2024-09-25 10:23:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:23:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-25 10:23:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:04,625 INFO L225 Difference]: With dead ends: 52 [2024-09-25 10:23:04,626 INFO L226 Difference]: Without dead ends: 28 [2024-09-25 10:23:04,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:23:04,636 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:04,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-25 10:23:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2024-09-25 10:23:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:23:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-25 10:23:04,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2024-09-25 10:23:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:04,678 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-25 10:23:04,678 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:23:04,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-25 10:23:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:23:04,681 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:04,681 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 10:23:04,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:23:04,682 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:04,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1906170241, now seen corresponding path program 1 times [2024-09-25 10:23:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922970551] [2024-09-25 10:23:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:04,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:04,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922970551] [2024-09-25 10:23:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922970551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531789771] [2024-09-25 10:23:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:04,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:04,870 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 10:23:04,872 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 10:23:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:04,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-25 10:23:04,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:05,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:23:05,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531789771] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:23:05,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:23:05,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-09-25 10:23:05,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662297431] [2024-09-25 10:23:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:23:05,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:23:05,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:23:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:23:05,007 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:23:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:05,076 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-09-25 10:23:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:23:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-25 10:23:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:05,077 INFO L225 Difference]: With dead ends: 35 [2024-09-25 10:23:05,078 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 10:23:05,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:23:05,079 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:05,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:23:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 10:23:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-09-25 10:23:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-09-25 10:23:05,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 17 [2024-09-25 10:23:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:05,091 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-09-25 10:23:05,091 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:23:05,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-09-25 10:23:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 10:23:05,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:05,092 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:05,110 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:05,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:05,293 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:05,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:05,294 INFO L85 PathProgramCache]: Analyzing trace with hash 468810935, now seen corresponding path program 1 times [2024-09-25 10:23:05,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:05,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531620484] [2024-09-25 10:23:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:05,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:05,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:23:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:05,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531620484] [2024-09-25 10:23:05,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531620484] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:05,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364344765] [2024-09-25 10:23:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:05,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:05,511 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 10:23:05,512 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 10:23:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:05,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:23:05,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:05,740 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 10:23:05,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:05,845 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 10:23:05,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364344765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:05,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:05,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-25 10:23:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733195727] [2024-09-25 10:23:05,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:05,846 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:23:05,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:23:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:23:05,848 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:05,958 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-25 10:23:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:23:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-25 10:23:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:05,960 INFO L225 Difference]: With dead ends: 51 [2024-09-25 10:23:05,961 INFO L226 Difference]: Without dead ends: 37 [2024-09-25 10:23:05,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:23:05,962 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:05,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-25 10:23:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-09-25 10:23:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-25 10:23:05,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2024-09-25 10:23:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:05,976 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-25 10:23:05,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:05,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-25 10:23:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 10:23:05,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:05,978 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:05,991 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:06,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:06,179 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:06,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1260603702, now seen corresponding path program 1 times [2024-09-25 10:23:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:06,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462372324] [2024-09-25 10:23:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:06,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:23:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:06,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:06,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462372324] [2024-09-25 10:23:06,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462372324] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:06,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031015996] [2024-09-25 10:23:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:06,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:06,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:06,348 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 10:23:06,357 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 10:23:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:23:06,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:06,521 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 10:23:06,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:06,598 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 10:23:06,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031015996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:06,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:06,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-09-25 10:23:06,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001399456] [2024-09-25 10:23:06,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:06,599 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:23:06,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:23:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:23:06,601 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:06,674 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-09-25 10:23:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:23:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-25 10:23:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:06,676 INFO L225 Difference]: With dead ends: 54 [2024-09-25 10:23:06,676 INFO L226 Difference]: Without dead ends: 40 [2024-09-25 10:23:06,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:23:06,678 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:06,679 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:23:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-25 10:23:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-09-25 10:23:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-25 10:23:06,688 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-25 10:23:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:06,688 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-25 10:23:06,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:06,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-25 10:23:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 10:23:06,692 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:06,692 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] [2024-09-25 10:23:06,709 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:23:06,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:06,893 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:06,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1756686302, now seen corresponding path program 2 times [2024-09-25 10:23:06,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:06,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944214643] [2024-09-25 10:23:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:06,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:23:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:06,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944214643] [2024-09-25 10:23:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944214643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815315097] [2024-09-25 10:23:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:07,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:07,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:07,004 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 10:23:07,005 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 10:23:07,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:07,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:23:07,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:07,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:23:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815315097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:07,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-09-25 10:23:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642537153] [2024-09-25 10:23:07,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:07,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 10:23:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 10:23:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-25 10:23:07,198 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:23:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:07,269 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-25 10:23:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 10:23:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-09-25 10:23:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:07,271 INFO L225 Difference]: With dead ends: 45 [2024-09-25 10:23:07,271 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 10:23:07,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:23:07,272 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:07,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:23:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 10:23:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-09-25 10:23:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-09-25 10:23:07,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2024-09-25 10:23:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:07,284 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-09-25 10:23:07,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:23:07,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-09-25 10:23:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:23:07,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:07,285 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:07,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:23:07,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:07,486 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:07,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2027964682, now seen corresponding path program 3 times [2024-09-25 10:23:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006468437] [2024-09-25 10:23:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:07,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:07,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:23:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:07,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:07,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006468437] [2024-09-25 10:23:07,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006468437] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054133221] [2024-09-25 10:23:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:07,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:07,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:07,659 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 10:23:07,661 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 10:23:07,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:23:07,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:07,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:23:07,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:07,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:07,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054133221] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:07,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:07,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-25 10:23:07,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134865824] [2024-09-25 10:23:07,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:07,982 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:23:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:23:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:23:07,983 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:08,122 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-25 10:23:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:23:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-25 10:23:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:08,124 INFO L225 Difference]: With dead ends: 68 [2024-09-25 10:23:08,124 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 10:23:08,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:23:08,125 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:08,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 170 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 10:23:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-25 10:23:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-25 10:23:08,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-25 10:23:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:08,135 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-25 10:23:08,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:08,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-25 10:23:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:23:08,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:08,137 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:08,155 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 10:23:08,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:23:08,338 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash 196646005, now seen corresponding path program 1 times [2024-09-25 10:23:08,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331925797] [2024-09-25 10:23:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:08,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:08,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:08,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:23:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:08,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331925797] [2024-09-25 10:23:08,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331925797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28157471] [2024-09-25 10:23:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:08,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:08,518 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 10:23:08,520 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 10:23:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:08,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:23:08,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:08,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:08,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28157471] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:08,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-09-25 10:23:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193919365] [2024-09-25 10:23:08,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:08,808 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:23:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:23:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:23:08,810 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:08,912 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-09-25 10:23:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:23:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-25 10:23:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:08,914 INFO L225 Difference]: With dead ends: 69 [2024-09-25 10:23:08,914 INFO L226 Difference]: Without dead ends: 52 [2024-09-25 10:23:08,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:23:08,915 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:08,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-25 10:23:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-09-25 10:23:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-25 10:23:08,927 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-25 10:23:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:08,927 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-25 10:23:08,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:08,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-25 10:23:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 10:23:08,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:08,929 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:08,941 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 10:23:09,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:09,132 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:09,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1948349674, now seen corresponding path program 2 times [2024-09-25 10:23:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:09,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405726575] [2024-09-25 10:23:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:23:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405726575] [2024-09-25 10:23:09,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405726575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922189973] [2024-09-25 10:23:09,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:09,266 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 10:23:09,268 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 10:23:09,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:09,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:09,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:23:09,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:09,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:09,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922189973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:09,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-09-25 10:23:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112323645] [2024-09-25 10:23:09,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:09,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 10:23:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 10:23:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:23:09,529 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:09,637 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-25 10:23:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:23:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-25 10:23:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:09,638 INFO L225 Difference]: With dead ends: 71 [2024-09-25 10:23:09,639 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 10:23:09,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:23:09,640 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:09,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 10:23:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2024-09-25 10:23:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-25 10:23:09,651 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 32 [2024-09-25 10:23:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:09,651 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-25 10:23:09,651 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:09,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-25 10:23:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:23:09,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:09,654 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:09,671 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 10:23:09,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:09,855 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:09,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash 21542753, now seen corresponding path program 4 times [2024-09-25 10:23:09,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208225401] [2024-09-25 10:23:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:09,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:23:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:09,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:09,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208225401] [2024-09-25 10:23:09,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208225401] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:09,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100704604] [2024-09-25 10:23:09,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:09,956 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 10:23:09,958 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 10:23:10,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:10,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:10,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:23:10,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:10,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:23:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100704604] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:10,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-25 10:23:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539215810] [2024-09-25 10:23:10,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:10,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:23:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:23:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:23:10,122 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:10,195 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2024-09-25 10:23:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:23:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2024-09-25 10:23:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:10,197 INFO L225 Difference]: With dead ends: 55 [2024-09-25 10:23:10,197 INFO L226 Difference]: Without dead ends: 53 [2024-09-25 10:23:10,197 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:23:10,198 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:10,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-25 10:23:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-09-25 10:23:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-25 10:23:10,209 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 33 [2024-09-25 10:23:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:10,210 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-25 10:23:10,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:23:10,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-25 10:23:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:23:10,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:10,211 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:10,228 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 10:23:10,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:10,413 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:10,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1043643689, now seen corresponding path program 5 times [2024-09-25 10:23:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371344486] [2024-09-25 10:23:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:23:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:10,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371344486] [2024-09-25 10:23:10,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371344486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442830384] [2024-09-25 10:23:10,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:10,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:10,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:10,589 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 10:23:10,591 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 10:23:10,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-25 10:23:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:10,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:23:10,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:10,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:10,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442830384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:10,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:10,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-25 10:23:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992003767] [2024-09-25 10:23:10,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:10,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:23:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:10,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:23:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:23:10,980 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:11,135 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2024-09-25 10:23:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:23:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-25 10:23:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:11,137 INFO L225 Difference]: With dead ends: 85 [2024-09-25 10:23:11,137 INFO L226 Difference]: Without dead ends: 65 [2024-09-25 10:23:11,137 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-25 10:23:11,138 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:11,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 247 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-25 10:23:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2024-09-25 10:23:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-25 10:23:11,147 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-25 10:23:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:11,147 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-25 10:23:11,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:11,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-25 10:23:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:23:11,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:11,149 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:11,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 10:23:11,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 10:23:11,353 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:11,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash -802541226, now seen corresponding path program 2 times [2024-09-25 10:23:11,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462750998] [2024-09-25 10:23:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:11,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:11,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:23:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:11,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:11,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462750998] [2024-09-25 10:23:11,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462750998] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:11,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853993623] [2024-09-25 10:23:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:11,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:11,536 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 10:23:11,538 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 10:23:11,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:11,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:11,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:23:11,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:11,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853993623] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:11,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-25 10:23:11,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417623597] [2024-09-25 10:23:11,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:11,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:23:11,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:23:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:23:11,878 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:11,998 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-25 10:23:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:23:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-25 10:23:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:12,000 INFO L225 Difference]: With dead ends: 87 [2024-09-25 10:23:12,000 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 10:23:12,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:23:12,001 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:12,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 10:23:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-25 10:23:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-25 10:23:12,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-25 10:23:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:12,019 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-25 10:23:12,019 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-25 10:23:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:23:12,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:12,020 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:12,036 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:23:12,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 10:23:12,225 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1560540919, now seen corresponding path program 3 times [2024-09-25 10:23:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979653440] [2024-09-25 10:23:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:23:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979653440] [2024-09-25 10:23:12,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979653440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:12,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220449444] [2024-09-25 10:23:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:12,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:12,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:23:12,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:23:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:12,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:23:12,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:12,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:12,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220449444] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:12,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2024-09-25 10:23:12,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63055289] [2024-09-25 10:23:12,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:12,680 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:23:12,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:23:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:23:12,681 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:12,798 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-25 10:23:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:23:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-25 10:23:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:12,800 INFO L225 Difference]: With dead ends: 87 [2024-09-25 10:23:12,800 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 10:23:12,800 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:23:12,801 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:12,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 10:23:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-25 10:23:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:12,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-25 10:23:12,810 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-25 10:23:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:12,810 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-25 10:23:12,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:12,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-25 10:23:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:23:12,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:12,811 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:12,828 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:23:13,012 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:13,012 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:13,013 INFO L85 PathProgramCache]: Analyzing trace with hash 251296054, now seen corresponding path program 3 times [2024-09-25 10:23:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308376829] [2024-09-25 10:23:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:23:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:23:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:23:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:13,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:13,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308376829] [2024-09-25 10:23:13,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308376829] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478064225] [2024-09-25 10:23:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:13,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:13,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:23:13,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:23:13,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:13,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:23:13,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:13,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478064225] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:13,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2024-09-25 10:23:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136530507] [2024-09-25 10:23:13,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:13,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 10:23:13,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 10:23:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:23:13,455 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:13,550 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-09-25 10:23:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:23:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-25 10:23:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:13,551 INFO L225 Difference]: With dead ends: 88 [2024-09-25 10:23:13,551 INFO L226 Difference]: Without dead ends: 68 [2024-09-25 10:23:13,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:23:13,552 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:13,553 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-25 10:23:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2024-09-25 10:23:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-09-25 10:23:13,567 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2024-09-25 10:23:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:13,568 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-09-25 10:23:13,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:13,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-09-25 10:23:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-25 10:23:13,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:13,572 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:13,588 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:13,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:23:13,774 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:13,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash -74536894, now seen corresponding path program 6 times [2024-09-25 10:23:13,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:13,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372682781] [2024-09-25 10:23:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:13,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:13,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372682781] [2024-09-25 10:23:13,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372682781] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:13,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432842675] [2024-09-25 10:23:13,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:13,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:13,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:13,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:13,891 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:23:13,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-25 10:23:13,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:13,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:13,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:13,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:23:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432842675] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:14,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:14,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-25 10:23:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383826973] [2024-09-25 10:23:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:14,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 10:23:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 10:23:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:23:14,069 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:14,140 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-25 10:23:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:23:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-09-25 10:23:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:14,142 INFO L225 Difference]: With dead ends: 65 [2024-09-25 10:23:14,142 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 10:23:14,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:23:14,143 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:14,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 10:23:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2024-09-25 10:23:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-09-25 10:23:14,153 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2024-09-25 10:23:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:14,154 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-09-25 10:23:14,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:23:14,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-09-25 10:23:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:23:14,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:14,155 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:14,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 10:23:14,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:23:14,356 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:14,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash 115327702, now seen corresponding path program 7 times [2024-09-25 10:23:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:14,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949674281] [2024-09-25 10:23:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949674281] [2024-09-25 10:23:14,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949674281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:14,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764862482] [2024-09-25 10:23:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:14,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:14,553 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:23:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:14,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:14,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:14,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764862482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:14,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:14,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-25 10:23:14,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724653261] [2024-09-25 10:23:14,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:14,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 10:23:14,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 10:23:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:23:14,988 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:15,136 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2024-09-25 10:23:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-25 10:23:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:15,138 INFO L225 Difference]: With dead ends: 102 [2024-09-25 10:23:15,138 INFO L226 Difference]: Without dead ends: 79 [2024-09-25 10:23:15,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2024-09-25 10:23:15,139 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:15,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-25 10:23:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-25 10:23:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-25 10:23:15,155 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-25 10:23:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:15,156 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-25 10:23:15,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:15,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-25 10:23:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:23:15,157 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:15,157 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:15,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 10:23:15,357 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 10:23:15,358 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:15,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 73646677, now seen corresponding path program 4 times [2024-09-25 10:23:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712814881] [2024-09-25 10:23:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:15,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712814881] [2024-09-25 10:23:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712814881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826786680] [2024-09-25 10:23:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:15,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:15,537 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:23:15,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:15,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:15,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:15,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:15,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:15,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826786680] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:15,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:15,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2024-09-25 10:23:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762336240] [2024-09-25 10:23:15,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:15,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 10:23:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 10:23:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:23:15,951 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:16,079 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-25 10:23:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-25 10:23:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:16,081 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:23:16,081 INFO L226 Difference]: Without dead ends: 82 [2024-09-25 10:23:16,081 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:23:16,082 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:16,082 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-25 10:23:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-25 10:23:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-25 10:23:16,095 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-25 10:23:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:16,096 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-25 10:23:16,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-25 10:23:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:23:16,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:16,098 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:16,111 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:16,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 10:23:16,298 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:16,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1867360522, now seen corresponding path program 5 times [2024-09-25 10:23:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:16,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416325830] [2024-09-25 10:23:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:16,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416325830] [2024-09-25 10:23:16,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416325830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130229609] [2024-09-25 10:23:16,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:16,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:16,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:16,495 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:23:16,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-25 10:23:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:16,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:16,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:16,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:16,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130229609] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:16,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:16,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2024-09-25 10:23:16,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127689463] [2024-09-25 10:23:16,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:16,906 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 10:23:16,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:16,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 10:23:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:23:16,907 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:17,020 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2024-09-25 10:23:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-25 10:23:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:17,022 INFO L225 Difference]: With dead ends: 106 [2024-09-25 10:23:17,022 INFO L226 Difference]: Without dead ends: 83 [2024-09-25 10:23:17,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:23:17,023 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:17,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-25 10:23:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2024-09-25 10:23:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-25 10:23:17,036 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-25 10:23:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:17,036 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-25 10:23:17,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:17,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-25 10:23:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:23:17,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:17,038 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:17,055 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:17,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:17,242 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:17,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 702425653, now seen corresponding path program 6 times [2024-09-25 10:23:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228274271] [2024-09-25 10:23:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:17,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228274271] [2024-09-25 10:23:17,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228274271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:17,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458543817] [2024-09-25 10:23:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:17,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:17,402 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:17,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:23:17,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-25 10:23:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:17,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:17,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:17,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458543817] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:17,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:17,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2024-09-25 10:23:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788856387] [2024-09-25 10:23:17,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:17,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 10:23:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:17,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 10:23:17,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-09-25 10:23:17,781 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:17,897 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-25 10:23:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-25 10:23:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:17,898 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:23:17,898 INFO L226 Difference]: Without dead ends: 82 [2024-09-25 10:23:17,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:23:17,900 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:17,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-25 10:23:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-25 10:23:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-25 10:23:17,912 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-25 10:23:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:17,912 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-25 10:23:17,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:17,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-25 10:23:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 10:23:17,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:17,913 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:17,930 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 10:23:18,117 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 10:23:18,118 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:18,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1616605974, now seen corresponding path program 4 times [2024-09-25 10:23:18,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:18,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081536468] [2024-09-25 10:23:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:23:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:23:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:23:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:23:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:18,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081536468] [2024-09-25 10:23:18,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081536468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:18,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378196347] [2024-09-25 10:23:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:18,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:18,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:18,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:23:18,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:18,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:18,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:23:18,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:18,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378196347] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:18,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:18,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2024-09-25 10:23:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205947583] [2024-09-25 10:23:18,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:18,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:23:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:23:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:23:18,676 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:18,784 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2024-09-25 10:23:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:18,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-25 10:23:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:18,785 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:23:18,785 INFO L226 Difference]: Without dead ends: 82 [2024-09-25 10:23:18,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-25 10:23:18,786 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:18,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 176 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-25 10:23:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2024-09-25 10:23:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-09-25 10:23:18,795 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 48 [2024-09-25 10:23:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:18,796 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-09-25 10:23:18,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:18,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-09-25 10:23:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 10:23:18,797 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:18,797 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:18,813 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:19,001 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:19,002 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:19,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -972518079, now seen corresponding path program 8 times [2024-09-25 10:23:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:19,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333319086] [2024-09-25 10:23:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:19,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333319086] [2024-09-25 10:23:19,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333319086] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:19,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149824797] [2024-09-25 10:23:19,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:19,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:19,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:19,118 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:23:19,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:19,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:19,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:23:19,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:19,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:23:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149824797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:19,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-09-25 10:23:19,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725176344] [2024-09-25 10:23:19,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:19,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:23:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:23:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:23:19,324 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:19,401 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2024-09-25 10:23:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:23:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2024-09-25 10:23:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:19,402 INFO L225 Difference]: With dead ends: 75 [2024-09-25 10:23:19,402 INFO L226 Difference]: Without dead ends: 73 [2024-09-25 10:23:19,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:23:19,403 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:19,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 127 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-25 10:23:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-09-25 10:23:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-09-25 10:23:19,412 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 49 [2024-09-25 10:23:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:19,412 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-09-25 10:23:19,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:23:19,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-09-25 10:23:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:19,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:19,413 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:19,429 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:19,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:19,614 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:19,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash 931729655, now seen corresponding path program 9 times [2024-09-25 10:23:19,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:19,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784369441] [2024-09-25 10:23:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:19,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:19,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784369441] [2024-09-25 10:23:19,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784369441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511812427] [2024-09-25 10:23:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:19,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:19,821 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:19,822 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:23:19,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:23:19,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:19,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:19,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:20,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511812427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:20,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:20,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-25 10:23:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304776770] [2024-09-25 10:23:20,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:20,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:23:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:23:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:23:20,311 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:20,454 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2024-09-25 10:23:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:20,456 INFO L225 Difference]: With dead ends: 119 [2024-09-25 10:23:20,456 INFO L226 Difference]: Without dead ends: 93 [2024-09-25 10:23:20,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:23:20,457 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:20,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-25 10:23:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2024-09-25 10:23:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-25 10:23:20,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-25 10:23:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:20,470 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-25 10:23:20,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:20,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-25 10:23:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:20,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:20,471 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:20,484 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:20,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 10:23:20,672 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:20,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1164893834, now seen corresponding path program 7 times [2024-09-25 10:23:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274585561] [2024-09-25 10:23:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:20,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274585561] [2024-09-25 10:23:20,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274585561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:20,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133842687] [2024-09-25 10:23:20,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:20,870 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:20,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:23:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:20,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:20,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:21,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133842687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:21,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-09-25 10:23:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793260685] [2024-09-25 10:23:21,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:21,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 10:23:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 10:23:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:23:21,356 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:21,485 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-25 10:23:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:21,485 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:21,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:21,486 INFO L225 Difference]: With dead ends: 123 [2024-09-25 10:23:21,487 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 10:23:21,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:23:21,488 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:21,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 212 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 10:23:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-25 10:23:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-25 10:23:21,504 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-25 10:23:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:21,505 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-25 10:23:21,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:21,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-25 10:23:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:21,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:21,506 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:21,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:21,706 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:21,707 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -401242857, now seen corresponding path program 8 times [2024-09-25 10:23:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101653839] [2024-09-25 10:23:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101653839] [2024-09-25 10:23:21,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101653839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:21,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56776127] [2024-09-25 10:23:21,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:21,905 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:21,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:23:21,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:21,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:21,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:22,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56776127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:22,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:22,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2024-09-25 10:23:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015189861] [2024-09-25 10:23:22,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:22,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 10:23:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 10:23:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:23:22,306 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:22,443 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-25 10:23:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:22,444 INFO L225 Difference]: With dead ends: 125 [2024-09-25 10:23:22,444 INFO L226 Difference]: Without dead ends: 99 [2024-09-25 10:23:22,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:23:22,445 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:22,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-25 10:23:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-25 10:23:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-25 10:23:22,455 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-25 10:23:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:22,455 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-25 10:23:22,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-25 10:23:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:22,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:22,456 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:22,471 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-25 10:23:22,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-25 10:23:22,657 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:22,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:22,657 INFO L85 PathProgramCache]: Analyzing trace with hash 177580374, now seen corresponding path program 9 times [2024-09-25 10:23:22,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:22,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029929884] [2024-09-25 10:23:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:22,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:22,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029929884] [2024-09-25 10:23:22,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029929884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:22,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254442358] [2024-09-25 10:23:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:22,838 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:22,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:23:22,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:23:22,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:22,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:22,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:23,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254442358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:23,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2024-09-25 10:23:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660908278] [2024-09-25 10:23:23,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:23,261 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 10:23:23,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 10:23:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2024-09-25 10:23:23,262 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:23,375 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-25 10:23:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:23,376 INFO L225 Difference]: With dead ends: 125 [2024-09-25 10:23:23,376 INFO L226 Difference]: Without dead ends: 99 [2024-09-25 10:23:23,377 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:23:23,377 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:23,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-25 10:23:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-25 10:23:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-25 10:23:23,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-25 10:23:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:23,395 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-25 10:23:23,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:23,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-25 10:23:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:23,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:23,396 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:23,412 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-25 10:23:23,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-25 10:23:23,597 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:23,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash 57704759, now seen corresponding path program 10 times [2024-09-25 10:23:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053411241] [2024-09-25 10:23:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:23,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053411241] [2024-09-25 10:23:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053411241] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818319414] [2024-09-25 10:23:23,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:23,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:23,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:23,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 10:23:23,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:23,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:23,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:24,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818319414] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:24,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-09-25 10:23:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081279732] [2024-09-25 10:23:24,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:24,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 10:23:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 10:23:24,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:23:24,194 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:24,343 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-25 10:23:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:24,345 INFO L225 Difference]: With dead ends: 123 [2024-09-25 10:23:24,345 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 10:23:24,346 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-25 10:23:24,346 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:24,346 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 219 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 10:23:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-25 10:23:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-25 10:23:24,363 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-25 10:23:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:24,363 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-25 10:23:24,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:24,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-25 10:23:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-25 10:23:24,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:24,368 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:24,384 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:24,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-25 10:23:24,569 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:24,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1747277514, now seen corresponding path program 5 times [2024-09-25 10:23:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:24,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324217981] [2024-09-25 10:23:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:23:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:23:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:23:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:23:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:23:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324217981] [2024-09-25 10:23:24,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324217981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7047412] [2024-09-25 10:23:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:24,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:24,756 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:24,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 10:23:24,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 10:23:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:24,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:23:24,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:24,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7047412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:25,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-09-25 10:23:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351180206] [2024-09-25 10:23:25,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:25,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 10:23:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 10:23:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:23:25,117 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:25,221 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2024-09-25 10:23:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:23:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-25 10:23:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:25,223 INFO L225 Difference]: With dead ends: 122 [2024-09-25 10:23:25,223 INFO L226 Difference]: Without dead ends: 96 [2024-09-25 10:23:25,223 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2024-09-25 10:23:25,223 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:25,224 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-25 10:23:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2024-09-25 10:23:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-09-25 10:23:25,236 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 56 [2024-09-25 10:23:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:25,236 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-09-25 10:23:25,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:23:25,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-09-25 10:23:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-25 10:23:25,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:25,237 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:25,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-25 10:23:25,438 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:25,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1189232738, now seen corresponding path program 10 times [2024-09-25 10:23:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:25,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282692281] [2024-09-25 10:23:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:25,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282692281] [2024-09-25 10:23:25,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282692281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:25,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45733372] [2024-09-25 10:23:25,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:25,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:25,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:25,566 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:25,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 10:23:25,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:25,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:25,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:25,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:25,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:23:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45733372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:25,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2024-09-25 10:23:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549260662] [2024-09-25 10:23:25,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:25,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:23:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:23:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:23:25,774 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:25,867 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2024-09-25 10:23:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:23:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-09-25 10:23:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:25,868 INFO L225 Difference]: With dead ends: 85 [2024-09-25 10:23:25,868 INFO L226 Difference]: Without dead ends: 83 [2024-09-25 10:23:25,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:23:25,868 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:25,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 181 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-25 10:23:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2024-09-25 10:23:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2024-09-25 10:23:25,878 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 57 [2024-09-25 10:23:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:25,878 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2024-09-25 10:23:25,878 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:23:25,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2024-09-25 10:23:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:25,879 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:25,879 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:25,892 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-25 10:23:26,082 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:26,083 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:26,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1762212170, now seen corresponding path program 11 times [2024-09-25 10:23:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697722807] [2024-09-25 10:23:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:26,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697722807] [2024-09-25 10:23:26,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697722807] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:26,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321541423] [2024-09-25 10:23:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:26,317 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:26,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-25 10:23:26,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 10:23:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:26,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:26,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:26,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:26,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321541423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:26,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:26,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-25 10:23:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267749169] [2024-09-25 10:23:26,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:26,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 10:23:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 10:23:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:23:26,940 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:27,078 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2024-09-25 10:23:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:27,079 INFO L225 Difference]: With dead ends: 136 [2024-09-25 10:23:27,079 INFO L226 Difference]: Without dead ends: 107 [2024-09-25 10:23:27,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:23:27,080 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:27,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-25 10:23:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2024-09-25 10:23:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:27,095 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:27,096 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:27,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:27,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:27,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:27,097 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:27,113 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:27,300 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-25 10:23:27,301 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:27,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1726081077, now seen corresponding path program 11 times [2024-09-25 10:23:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142070025] [2024-09-25 10:23:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:27,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142070025] [2024-09-25 10:23:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142070025] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781507361] [2024-09-25 10:23:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:27,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:27,508 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-25 10:23:27,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 10:23:27,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:27,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:27,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:27,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781507361] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:27,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:27,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2024-09-25 10:23:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572320511] [2024-09-25 10:23:27,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:27,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 10:23:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 10:23:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:23:27,962 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:28,130 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-25 10:23:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:28,132 INFO L225 Difference]: With dead ends: 141 [2024-09-25 10:23:28,132 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 10:23:28,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:23:28,133 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:28,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 10:23:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-25 10:23:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:28,149 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:28,149 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:28,149 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:28,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:28,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:28,150 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:28,165 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:28,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-25 10:23:28,351 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:28,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 12 times [2024-09-25 10:23:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966416089] [2024-09-25 10:23:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:28,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:28,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966416089] [2024-09-25 10:23:28,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966416089] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:28,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594076725] [2024-09-25 10:23:28,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:28,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:28,569 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:28,570 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-25 10:23:28,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 10:23:28,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:28,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:28,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:28,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594076725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:29,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:29,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2024-09-25 10:23:29,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019366060] [2024-09-25 10:23:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:29,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:23:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:23:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:23:29,119 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:29,303 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-25 10:23:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:29,305 INFO L225 Difference]: With dead ends: 144 [2024-09-25 10:23:29,305 INFO L226 Difference]: Without dead ends: 115 [2024-09-25 10:23:29,305 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:23:29,306 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:29,306 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 230 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-25 10:23:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-25 10:23:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:29,317 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:29,317 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:29,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:29,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:29,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:29,318 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:29,331 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:29,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:29,519 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:29,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1162907669, now seen corresponding path program 13 times [2024-09-25 10:23:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:29,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484830571] [2024-09-25 10:23:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 53 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:29,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:29,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484830571] [2024-09-25 10:23:29,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484830571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842834623] [2024-09-25 10:23:29,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:29,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:29,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:29,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-25 10:23:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:29,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:29,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:30,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842834623] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:30,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2024-09-25 10:23:30,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607397956] [2024-09-25 10:23:30,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:30,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 10:23:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 10:23:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:23:30,230 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:30,400 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2024-09-25 10:23:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:30,402 INFO L225 Difference]: With dead ends: 145 [2024-09-25 10:23:30,402 INFO L226 Difference]: Without dead ends: 116 [2024-09-25 10:23:30,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:23:30,403 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:30,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-25 10:23:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2024-09-25 10:23:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:30,420 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:30,420 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:30,420 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:30,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:30,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:30,421 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:30,433 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-25 10:23:30,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-25 10:23:30,622 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:30,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1920338186, now seen corresponding path program 14 times [2024-09-25 10:23:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:30,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075349245] [2024-09-25 10:23:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:30,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:30,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:30,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075349245] [2024-09-25 10:23:30,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075349245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:30,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233801337] [2024-09-25 10:23:30,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:30,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:30,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:30,852 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:30,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-25 10:23:30,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:30,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:30,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:31,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233801337] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:31,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2024-09-25 10:23:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873435519] [2024-09-25 10:23:31,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:31,371 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-25 10:23:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-25 10:23:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:23:31,372 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:31,553 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-25 10:23:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:31,554 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:31,555 INFO L225 Difference]: With dead ends: 144 [2024-09-25 10:23:31,555 INFO L226 Difference]: Without dead ends: 115 [2024-09-25 10:23:31,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:23:31,556 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:31,556 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 217 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-25 10:23:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-25 10:23:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:31,571 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:31,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:31,571 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:31,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:31,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:31,571 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:31,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:31,572 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:31,583 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:31,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:31,772 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash 889696245, now seen corresponding path program 15 times [2024-09-25 10:23:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257857640] [2024-09-25 10:23:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257857640] [2024-09-25 10:23:31,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257857640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:31,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827234024] [2024-09-25 10:23:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:31,979 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:31,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-25 10:23:32,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-25 10:23:32,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:32,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:32,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:32,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:32,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827234024] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:32,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:32,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2024-09-25 10:23:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202887888] [2024-09-25 10:23:32,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:32,486 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 10:23:32,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:32,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 10:23:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:23:32,488 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:32,683 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-25 10:23:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:32,684 INFO L225 Difference]: With dead ends: 141 [2024-09-25 10:23:32,684 INFO L226 Difference]: Without dead ends: 112 [2024-09-25 10:23:32,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2024-09-25 10:23:32,685 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:32,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-25 10:23:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-25 10:23:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-25 10:23:32,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-25 10:23:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:32,703 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-25 10:23:32,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:32,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-25 10:23:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-25 10:23:32,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:32,704 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:32,721 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:32,907 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-25 10:23:32,908 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:32,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2088721174, now seen corresponding path program 6 times [2024-09-25 10:23:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:32,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105607872] [2024-09-25 10:23:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:23:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:23:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:23:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:23:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:23:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:23:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105607872] [2024-09-25 10:23:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105607872] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592637379] [2024-09-25 10:23:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:33,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:33,127 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-25 10:23:33,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 10:23:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:33,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:23:33,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:33,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:33,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592637379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:33,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:33,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-09-25 10:23:33,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316525649] [2024-09-25 10:23:33,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:33,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 10:23:33,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 10:23:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:23:33,627 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:33,757 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2024-09-25 10:23:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:23:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-25 10:23:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:33,758 INFO L225 Difference]: With dead ends: 139 [2024-09-25 10:23:33,758 INFO L226 Difference]: Without dead ends: 110 [2024-09-25 10:23:33,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 117 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:23:33,759 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:33,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 201 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-25 10:23:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2024-09-25 10:23:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2024-09-25 10:23:33,775 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 64 [2024-09-25 10:23:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:33,775 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2024-09-25 10:23:33,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:23:33,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2024-09-25 10:23:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-25 10:23:33,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:33,776 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:33,790 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:33,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-25 10:23:33,977 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:33,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:33,977 INFO L85 PathProgramCache]: Analyzing trace with hash -968139999, now seen corresponding path program 12 times [2024-09-25 10:23:33,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:33,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256111928] [2024-09-25 10:23:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:34,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256111928] [2024-09-25 10:23:34,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256111928] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228691822] [2024-09-25 10:23:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:34,098 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-25 10:23:34,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 10:23:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:34,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:34,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:34,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:23:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228691822] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:34,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2024-09-25 10:23:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422631621] [2024-09-25 10:23:34,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:34,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:23:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:23:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:23:34,324 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:34,406 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-09-25 10:23:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:23:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 65 [2024-09-25 10:23:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:34,407 INFO L225 Difference]: With dead ends: 95 [2024-09-25 10:23:34,407 INFO L226 Difference]: Without dead ends: 93 [2024-09-25 10:23:34,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:23:34,408 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:34,408 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 175 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-25 10:23:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-25 10:23:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2024-09-25 10:23:34,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 65 [2024-09-25 10:23:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:34,429 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2024-09-25 10:23:34,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:23:34,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2024-09-25 10:23:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:34,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:34,430 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:34,447 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-25 10:23:34,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-25 10:23:34,631 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:34,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash -16980201, now seen corresponding path program 13 times [2024-09-25 10:23:34,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:34,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404870743] [2024-09-25 10:23:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:34,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404870743] [2024-09-25 10:23:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404870743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849780777] [2024-09-25 10:23:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:34,870 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-25 10:23:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:34,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:34,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:35,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:35,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849780777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:35,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:35,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-25 10:23:35,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230053646] [2024-09-25 10:23:35,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:35,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:23:35,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:35,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:23:35,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:23:35,455 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:35,702 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2024-09-25 10:23:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:35,704 INFO L225 Difference]: With dead ends: 153 [2024-09-25 10:23:35,704 INFO L226 Difference]: Without dead ends: 121 [2024-09-25 10:23:35,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:23:35,706 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:35,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 308 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:23:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-25 10:23:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2024-09-25 10:23:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:35,726 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:35,726 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:35,727 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:35,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:35,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:35,728 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:35,744 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:35,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-25 10:23:35,929 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:35,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:35,929 INFO L85 PathProgramCache]: Analyzing trace with hash 338303382, now seen corresponding path program 16 times [2024-09-25 10:23:35,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:35,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733204371] [2024-09-25 10:23:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:36,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733204371] [2024-09-25 10:23:36,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733204371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727487990] [2024-09-25 10:23:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:36,170 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-25 10:23:36,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:36,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:36,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:36,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:36,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727487990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:36,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:36,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2024-09-25 10:23:36,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584327409] [2024-09-25 10:23:36,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:36,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 10:23:36,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 10:23:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:23:36,718 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:36,886 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-25 10:23:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:36,887 INFO L225 Difference]: With dead ends: 159 [2024-09-25 10:23:36,887 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 10:23:36,888 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:23:36,888 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:36,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 278 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 10:23:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-25 10:23:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:36,908 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:36,908 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:36,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:36,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:36,909 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:36,921 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:37,109 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:37,110 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:37,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash 626858807, now seen corresponding path program 17 times [2024-09-25 10:23:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931468083] [2024-09-25 10:23:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931468083] [2024-09-25 10:23:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931468083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732941127] [2024-09-25 10:23:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:37,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:37,327 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:37,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-25 10:23:37,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-25 10:23:37,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:37,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:37,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:37,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732941127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:37,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2024-09-25 10:23:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142148070] [2024-09-25 10:23:37,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:37,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-25 10:23:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-25 10:23:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 10:23:37,838 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:37,971 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-25 10:23:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:37,971 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:37,972 INFO L225 Difference]: With dead ends: 163 [2024-09-25 10:23:37,972 INFO L226 Difference]: Without dead ends: 131 [2024-09-25 10:23:37,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 127 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:23:37,973 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:37,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-25 10:23:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-25 10:23:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:37,991 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:37,991 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:37,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:37,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:37,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:37,992 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:38,006 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:38,193 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-25 10:23:38,193 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:38,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash 81977718, now seen corresponding path program 18 times [2024-09-25 10:23:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174324284] [2024-09-25 10:23:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:38,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174324284] [2024-09-25 10:23:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174324284] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766596090] [2024-09-25 10:23:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:38,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:38,395 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:38,397 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-25 10:23:38,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-25 10:23:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:38,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:38,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:38,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766596090] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:38,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:38,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2024-09-25 10:23:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356875312] [2024-09-25 10:23:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:38,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 10:23:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 10:23:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:23:38,923 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:39,165 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-25 10:23:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:39,166 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:39,167 INFO L225 Difference]: With dead ends: 165 [2024-09-25 10:23:39,167 INFO L226 Difference]: Without dead ends: 133 [2024-09-25 10:23:39,168 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 128 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 10:23:39,168 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:39,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 242 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:23:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-25 10:23:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-25 10:23:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:39,193 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:39,193 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:39,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:39,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:39,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:39,195 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:39,211 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-25 10:23:39,395 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-25 10:23:39,396 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:39,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1736714409, now seen corresponding path program 19 times [2024-09-25 10:23:39,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259868583] [2024-09-25 10:23:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259868583] [2024-09-25 10:23:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259868583] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214265888] [2024-09-25 10:23:39,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:39,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:39,651 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:39,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-25 10:23:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:39,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:39,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:40,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214265888] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:40,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:40,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2024-09-25 10:23:40,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160365016] [2024-09-25 10:23:40,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:40,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 10:23:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 10:23:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:23:40,221 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:40,436 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-25 10:23:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:40,439 INFO L225 Difference]: With dead ends: 165 [2024-09-25 10:23:40,439 INFO L226 Difference]: Without dead ends: 133 [2024-09-25 10:23:40,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:23:40,440 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:40,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-25 10:23:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-25 10:23:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:40,467 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:40,467 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:40,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:40,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:40,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:40,468 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:40,485 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-25 10:23:40,669 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-25 10:23:40,669 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:40,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1391206742, now seen corresponding path program 20 times [2024-09-25 10:23:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:40,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267571640] [2024-09-25 10:23:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:40,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267571640] [2024-09-25 10:23:40,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267571640] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697033967] [2024-09-25 10:23:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:40,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:40,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:40,936 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:40,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-25 10:23:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:40,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:40,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:41,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697033967] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:41,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:41,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2024-09-25 10:23:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799798485] [2024-09-25 10:23:41,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:41,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 10:23:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 10:23:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:23:41,421 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:41,649 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-25 10:23:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:41,652 INFO L225 Difference]: With dead ends: 163 [2024-09-25 10:23:41,652 INFO L226 Difference]: Without dead ends: 131 [2024-09-25 10:23:41,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:23:41,653 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:41,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 262 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-25 10:23:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-25 10:23:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:41,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:41,681 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:41,681 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:41,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:41,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:41,682 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:41,698 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:41,882 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-09-25 10:23:41,883 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:41,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:41,883 INFO L85 PathProgramCache]: Analyzing trace with hash 106634103, now seen corresponding path program 21 times [2024-09-25 10:23:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:41,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650131695] [2024-09-25 10:23:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:41,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:42,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650131695] [2024-09-25 10:23:42,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650131695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138523490] [2024-09-25 10:23:42,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:42,090 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:42,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-25 10:23:42,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-25 10:23:42,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:42,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:42,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:42,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138523490] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:42,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2024-09-25 10:23:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234227111] [2024-09-25 10:23:42,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:42,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:23:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:23:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:23:42,544 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:42,708 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-25 10:23:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:42,710 INFO L225 Difference]: With dead ends: 159 [2024-09-25 10:23:42,710 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 10:23:42,711 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:23:42,711 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:42,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 10:23:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-25 10:23:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-25 10:23:42,733 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-25 10:23:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:42,733 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-25 10:23:42,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:42,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-25 10:23:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-25 10:23:42,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:42,734 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:42,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:42,934 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:42,935 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:42,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2013013706, now seen corresponding path program 7 times [2024-09-25 10:23:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:42,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092515558] [2024-09-25 10:23:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:23:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:23:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:23:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:23:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:23:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:23:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:23:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:43,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092515558] [2024-09-25 10:23:43,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092515558] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:43,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332198152] [2024-09-25 10:23:43,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:43,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:43,184 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:43,185 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-25 10:23:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:43,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:23:43,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:43,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332198152] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:43,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2024-09-25 10:23:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403378092] [2024-09-25 10:23:43,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:43,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 10:23:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 10:23:43,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:23:43,673 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:43,834 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-09-25 10:23:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:23:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-25 10:23:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:43,836 INFO L225 Difference]: With dead ends: 156 [2024-09-25 10:23:43,836 INFO L226 Difference]: Without dead ends: 124 [2024-09-25 10:23:43,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:23:43,836 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:43,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 295 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-25 10:23:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2024-09-25 10:23:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-09-25 10:23:43,866 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 72 [2024-09-25 10:23:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:43,868 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-09-25 10:23:43,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:23:43,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-09-25 10:23:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 10:23:43,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:43,869 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:43,882 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-25 10:23:44,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:44,069 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:44,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash 588767362, now seen corresponding path program 14 times [2024-09-25 10:23:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504381811] [2024-09-25 10:23:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:44,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504381811] [2024-09-25 10:23:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504381811] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170237047] [2024-09-25 10:23:44,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:44,192 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-25 10:23:44,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:44,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 10:23:44,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:44,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:23:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170237047] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:44,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:44,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2024-09-25 10:23:44,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438429379] [2024-09-25 10:23:44,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:44,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:23:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:23:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:23:44,426 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:44,516 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-09-25 10:23:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:23:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 73 [2024-09-25 10:23:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:44,518 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:23:44,518 INFO L226 Difference]: Without dead ends: 103 [2024-09-25 10:23:44,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:23:44,518 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:44,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 207 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-25 10:23:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-09-25 10:23:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-09-25 10:23:44,546 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 73 [2024-09-25 10:23:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:44,546 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-09-25 10:23:44,547 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:23:44,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-09-25 10:23:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:44,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:44,548 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:44,564 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:44,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-25 10:23:44,748 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:44,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1028833942, now seen corresponding path program 15 times [2024-09-25 10:23:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983579873] [2024-09-25 10:23:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:44,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:44,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983579873] [2024-09-25 10:23:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983579873] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564795098] [2024-09-25 10:23:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:44,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:44,985 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:44,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-25 10:23:45,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-25 10:23:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:45,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:45,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:45,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:45,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564795098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:45,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:45,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-25 10:23:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734171626] [2024-09-25 10:23:45,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:45,615 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-25 10:23:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-25 10:23:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:23:45,616 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:45,836 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-09-25 10:23:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:45,836 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:45,837 INFO L225 Difference]: With dead ends: 170 [2024-09-25 10:23:45,837 INFO L226 Difference]: Without dead ends: 135 [2024-09-25 10:23:45,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:23:45,838 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:45,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-25 10:23:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2024-09-25 10:23:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:45,870 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:45,870 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:45,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:45,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:45,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:45,872 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:45,888 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-09-25 10:23:46,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-25 10:23:46,072 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1054800363, now seen corresponding path program 22 times [2024-09-25 10:23:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052876661] [2024-09-25 10:23:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:46,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052876661] [2024-09-25 10:23:46,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052876661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097536865] [2024-09-25 10:23:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:46,305 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:46,306 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-25 10:23:46,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:46,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:46,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:46,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:46,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097536865] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:46,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:46,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2024-09-25 10:23:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919206937] [2024-09-25 10:23:46,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:46,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 10:23:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 10:23:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:23:46,919 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:47,101 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-25 10:23:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:47,102 INFO L225 Difference]: With dead ends: 177 [2024-09-25 10:23:47,102 INFO L226 Difference]: Without dead ends: 142 [2024-09-25 10:23:47,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:23:47,103 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:47,103 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 258 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-25 10:23:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-25 10:23:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:47,138 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:47,138 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:47,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:47,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:47,139 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:47,153 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-25 10:23:47,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:47,340 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:47,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1926026934, now seen corresponding path program 23 times [2024-09-25 10:23:47,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:47,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824844355] [2024-09-25 10:23:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:47,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824844355] [2024-09-25 10:23:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824844355] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845378696] [2024-09-25 10:23:47,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:47,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:47,560 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:47,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-25 10:23:47,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-25 10:23:47,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:47,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:47,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:47,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845378696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:48,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:48,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2024-09-25 10:23:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626068075] [2024-09-25 10:23:48,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:48,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-25 10:23:48,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-25 10:23:48,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:23:48,186 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:48,409 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-25 10:23:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:48,415 INFO L225 Difference]: With dead ends: 182 [2024-09-25 10:23:48,415 INFO L226 Difference]: Without dead ends: 147 [2024-09-25 10:23:48,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:23:48,415 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:48,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 347 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-25 10:23:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-25 10:23:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:48,440 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:48,441 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:48,441 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:48,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:48,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:48,442 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:48,455 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-25 10:23:48,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:48,643 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:48,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1745087989, now seen corresponding path program 24 times [2024-09-25 10:23:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:48,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912207684] [2024-09-25 10:23:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912207684] [2024-09-25 10:23:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912207684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785347593] [2024-09-25 10:23:48,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:48,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:48,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:48,859 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:48,861 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-25 10:23:48,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-25 10:23:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:48,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:48,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:49,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785347593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:49,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:49,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2024-09-25 10:23:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117879405] [2024-09-25 10:23:49,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:49,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 10:23:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 10:23:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:23:49,432 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:49,669 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-25 10:23:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:49,671 INFO L225 Difference]: With dead ends: 185 [2024-09-25 10:23:49,671 INFO L226 Difference]: Without dead ends: 150 [2024-09-25 10:23:49,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 142 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:23:49,672 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:49,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 310 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-25 10:23:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-25 10:23:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:49,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:49,699 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:49,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:49,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:49,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:49,700 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:49,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-25 10:23:49,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-25 10:23:49,900 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1308790058, now seen corresponding path program 25 times [2024-09-25 10:23:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:49,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118952937] [2024-09-25 10:23:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:49,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118952937] [2024-09-25 10:23:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118952937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543297993] [2024-09-25 10:23:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:23:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:50,144 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-25 10:23:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:50,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:50,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:50,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543297993] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:50,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2024-09-25 10:23:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304598565] [2024-09-25 10:23:50,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:50,705 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:23:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:23:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:23:50,706 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:50,948 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2024-09-25 10:23:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:50,949 INFO L225 Difference]: With dead ends: 186 [2024-09-25 10:23:50,949 INFO L226 Difference]: Without dead ends: 151 [2024-09-25 10:23:50,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:23:50,950 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:50,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:23:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-25 10:23:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2024-09-25 10:23:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:50,978 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:50,978 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:50,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:50,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:50,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:50,979 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:50,991 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-25 10:23:51,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-25 10:23:51,179 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash 809455061, now seen corresponding path program 26 times [2024-09-25 10:23:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:51,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454117524] [2024-09-25 10:23:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:51,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454117524] [2024-09-25 10:23:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454117524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942200811] [2024-09-25 10:23:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:51,421 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:51,422 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-25 10:23:51,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:51,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:51,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:51,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942200811] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2024-09-25 10:23:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926792163] [2024-09-25 10:23:51,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:51,963 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 10:23:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 10:23:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:23:51,964 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:52,209 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-25 10:23:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:52,211 INFO L225 Difference]: With dead ends: 185 [2024-09-25 10:23:52,211 INFO L226 Difference]: Without dead ends: 150 [2024-09-25 10:23:52,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 144 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:23:52,212 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:52,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-25 10:23:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-25 10:23:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:52,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:52,256 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:52,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:52,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:52,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:52,259 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:52,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-25 10:23:52,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-25 10:23:52,459 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:52,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2031708426, now seen corresponding path program 27 times [2024-09-25 10:23:52,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:52,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310796130] [2024-09-25 10:23:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:52,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310796130] [2024-09-25 10:23:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310796130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109104568] [2024-09-25 10:23:52,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:23:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:52,671 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:52,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-25 10:23:52,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-25 10:23:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:52,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:52,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:53,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109104568] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:53,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2024-09-25 10:23:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351471596] [2024-09-25 10:23:53,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:53,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-25 10:23:53,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-25 10:23:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 10:23:53,220 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:53,431 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-25 10:23:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:53,433 INFO L225 Difference]: With dead ends: 182 [2024-09-25 10:23:53,433 INFO L226 Difference]: Without dead ends: 147 [2024-09-25 10:23:53,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 145 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:23:53,434 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:53,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 264 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-25 10:23:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-25 10:23:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:53,470 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:53,471 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:53,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:53,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:53,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:53,472 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:53,483 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-25 10:23:53,672 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-09-25 10:23:53,672 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:53,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 93398453, now seen corresponding path program 28 times [2024-09-25 10:23:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847957156] [2024-09-25 10:23:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:53,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847957156] [2024-09-25 10:23:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847957156] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506195084] [2024-09-25 10:23:53,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:53,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:53,923 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:53,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-25 10:23:53,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:53,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:53,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:53,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:54,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506195084] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:54,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:54,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-09-25 10:23:54,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968120572] [2024-09-25 10:23:54,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:54,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 10:23:54,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 10:23:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:23:54,455 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:54,657 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-25 10:23:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:54,659 INFO L225 Difference]: With dead ends: 177 [2024-09-25 10:23:54,659 INFO L226 Difference]: Without dead ends: 142 [2024-09-25 10:23:54,660 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2024-09-25 10:23:54,660 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:54,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 286 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-25 10:23:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-25 10:23:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-25 10:23:54,703 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-25 10:23:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:54,703 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-25 10:23:54,704 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-25 10:23:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-25 10:23:54,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:54,705 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:54,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-09-25 10:23:54,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:54,905 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1777712362, now seen corresponding path program 8 times [2024-09-25 10:23:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306857328] [2024-09-25 10:23:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:23:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:23:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:23:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:23:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:23:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:23:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:23:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:23:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:55,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:55,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306857328] [2024-09-25 10:23:55,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306857328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:55,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078099486] [2024-09-25 10:23:55,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:23:55,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:55,133 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:55,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-25 10:23:55,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:23:55,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:55,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:23:55,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:55,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:55,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078099486] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:55,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:55,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2024-09-25 10:23:55,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717659100] [2024-09-25 10:23:55,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:55,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-25 10:23:55,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-25 10:23:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:23:55,638 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:55,825 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2024-09-25 10:23:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:23:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-25 10:23:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:55,827 INFO L225 Difference]: With dead ends: 173 [2024-09-25 10:23:55,827 INFO L226 Difference]: Without dead ends: 138 [2024-09-25 10:23:55,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:23:55,828 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:55,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 257 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-25 10:23:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2024-09-25 10:23:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:23:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2024-09-25 10:23:55,867 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 80 [2024-09-25 10:23:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:55,868 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2024-09-25 10:23:55,868 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:23:55,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2024-09-25 10:23:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-25 10:23:55,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:55,869 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:55,880 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-25 10:23:56,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:56,069 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:56,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash 805249281, now seen corresponding path program 16 times [2024-09-25 10:23:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:56,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383735108] [2024-09-25 10:23:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:23:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:23:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:23:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:23:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:23:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:23:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:23:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 52 proven. 109 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383735108] [2024-09-25 10:23:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383735108] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810025156] [2024-09-25 10:23:56,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:23:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:56,227 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-25 10:23:56,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:23:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:56,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:23:56,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:56,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:23:56,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810025156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:56,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:56,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2024-09-25 10:23:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980091219] [2024-09-25 10:23:56,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:56,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:23:56,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:23:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:23:56,491 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:56,605 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2024-09-25 10:23:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:23:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 81 [2024-09-25 10:23:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:56,606 INFO L225 Difference]: With dead ends: 115 [2024-09-25 10:23:56,606 INFO L226 Difference]: Without dead ends: 113 [2024-09-25 10:23:56,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 168 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:23:56,607 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:56,607 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-25 10:23:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-25 10:23:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 86 states have internal predecessors, (97), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:23:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2024-09-25 10:23:56,647 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 81 [2024-09-25 10:23:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:56,648 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2024-09-25 10:23:56,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:23:56,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2024-09-25 10:23:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:23:56,648 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:56,648 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:56,660 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-09-25 10:23:56,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:56,849 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:56,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 41469239, now seen corresponding path program 17 times [2024-09-25 10:23:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:56,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653569048] [2024-09-25 10:23:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:23:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:23:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:23:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:23:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:23:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:23:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:23:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:23:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:57,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:57,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653569048] [2024-09-25 10:23:57,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653569048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:57,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103575427] [2024-09-25 10:23:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:57,128 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:57,128 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-25 10:23:57,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-25 10:23:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:57,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:23:57,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:57,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:57,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103575427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:57,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:57,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-25 10:23:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212418682] [2024-09-25 10:23:57,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:57,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:23:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:23:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:23:57,846 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:23:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:58,043 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2024-09-25 10:23:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:23:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:23:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:58,045 INFO L225 Difference]: With dead ends: 187 [2024-09-25 10:23:58,045 INFO L226 Difference]: Without dead ends: 149 [2024-09-25 10:23:58,045 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1991, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:23:58,046 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:58,046 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 235 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-25 10:23:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2024-09-25 10:23:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:23:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:23:58,080 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:23:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:58,081 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:23:58,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:23:58,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:23:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:23:58,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:58,082 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:58,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-25 10:23:58,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:58,283 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:58,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1330059702, now seen corresponding path program 29 times [2024-09-25 10:23:58,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:58,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941170373] [2024-09-25 10:23:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:23:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:23:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:23:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:23:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:23:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:23:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:23:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:23:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:58,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:58,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941170373] [2024-09-25 10:23:58,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941170373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:58,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44120713] [2024-09-25 10:23:58,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:23:58,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:58,531 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:58,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-25 10:23:58,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-25 10:23:58,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:23:58,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:23:58,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:23:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:59,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:23:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44120713] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:23:59,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:23:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-25 10:23:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608583051] [2024-09-25 10:23:59,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:23:59,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:23:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:23:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:23:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:23:59,229 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:23:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:23:59,454 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-25 10:23:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:23:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:23:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:23:59,456 INFO L225 Difference]: With dead ends: 195 [2024-09-25 10:23:59,456 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 10:23:59,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 154 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:23:59,457 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:23:59,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 273 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:23:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 10:23:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-25 10:23:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:23:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:23:59,509 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:23:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:23:59,510 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:23:59,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:23:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:23:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:23:59,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:23:59,510 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:23:59,522 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-25 10:23:59,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:59,711 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:23:59,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:23:59,711 INFO L85 PathProgramCache]: Analyzing trace with hash -13846185, now seen corresponding path program 30 times [2024-09-25 10:23:59,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:23:59,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438589261] [2024-09-25 10:23:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:23:59,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:23:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:23:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:23:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:23:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:23:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:23:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:23:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:23:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:23:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:23:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:23:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:23:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:23:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:23:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438589261] [2024-09-25 10:23:59,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438589261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:23:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241072458] [2024-09-25 10:23:59,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:23:59,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:23:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:23:59,959 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:23:59,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-25 10:24:00,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-25 10:24:00,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:00,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:00,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:00,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:00,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241072458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:00,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:00,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-25 10:24:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658204395] [2024-09-25 10:24:00,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:00,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:24:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:24:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:00,641 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:00,907 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-25 10:24:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:00,908 INFO L225 Difference]: With dead ends: 201 [2024-09-25 10:24:00,908 INFO L226 Difference]: Without dead ends: 163 [2024-09-25 10:24:00,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 155 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:24:00,909 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:00,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 360 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-25 10:24:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-25 10:24:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:00,965 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:00,966 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:00,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:00,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:00,967 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:00,967 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:00,984 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-25 10:24:01,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-25 10:24:01,168 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:01,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1882464662, now seen corresponding path program 31 times [2024-09-25 10:24:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:01,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993608137] [2024-09-25 10:24:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:01,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993608137] [2024-09-25 10:24:01,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993608137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:01,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109293859] [2024-09-25 10:24:01,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:01,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:01,413 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:01,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-25 10:24:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:01,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:01,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:01,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:02,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109293859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:02,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2024-09-25 10:24:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038843438] [2024-09-25 10:24:02,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:02,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 10:24:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 10:24:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:24:02,109 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:02,382 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-25 10:24:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:02,384 INFO L225 Difference]: With dead ends: 205 [2024-09-25 10:24:02,384 INFO L226 Difference]: Without dead ends: 167 [2024-09-25 10:24:02,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:02,384 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:02,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 351 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-25 10:24:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-25 10:24:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:02,421 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:02,421 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:02,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:02,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:02,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:02,422 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:02,435 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-25 10:24:02,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-25 10:24:02,623 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:02,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1250899319, now seen corresponding path program 32 times [2024-09-25 10:24:02,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399889267] [2024-09-25 10:24:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399889267] [2024-09-25 10:24:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399889267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820792461] [2024-09-25 10:24:02,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:02,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:02,931 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:02,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-25 10:24:02,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:02,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:02,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:02,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:03,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:03,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820792461] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:03,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:03,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2024-09-25 10:24:03,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834634329] [2024-09-25 10:24:03,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:03,662 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-25 10:24:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:03,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-25 10:24:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:24:03,663 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:03,939 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-25 10:24:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:03,940 INFO L225 Difference]: With dead ends: 207 [2024-09-25 10:24:03,940 INFO L226 Difference]: Without dead ends: 169 [2024-09-25 10:24:03,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 157 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:24:03,941 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:03,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 240 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-25 10:24:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-25 10:24:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:03,999 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:04,000 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:04,000 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:04,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:04,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:04,001 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:04,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-25 10:24:04,205 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-25 10:24:04,206 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:04,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash -293494410, now seen corresponding path program 33 times [2024-09-25 10:24:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:04,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115737859] [2024-09-25 10:24:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:04,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115737859] [2024-09-25 10:24:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115737859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090801580] [2024-09-25 10:24:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:04,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:04,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:04,531 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:04,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-25 10:24:04,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 10:24:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:04,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:04,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:05,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:05,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090801580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:05,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:05,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2024-09-25 10:24:05,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53366891] [2024-09-25 10:24:05,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:05,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 10:24:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 10:24:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:24:05,299 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:05,566 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-25 10:24:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:05,567 INFO L225 Difference]: With dead ends: 207 [2024-09-25 10:24:05,567 INFO L226 Difference]: Without dead ends: 169 [2024-09-25 10:24:05,567 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 158 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:24:05,568 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:05,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 263 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-25 10:24:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-25 10:24:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:05,622 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:05,623 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:05,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:05,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:05,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:05,624 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:05,640 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-09-25 10:24:05,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-25 10:24:05,825 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:05,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1319254423, now seen corresponding path program 34 times [2024-09-25 10:24:05,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346222478] [2024-09-25 10:24:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:06,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:06,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346222478] [2024-09-25 10:24:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346222478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917468703] [2024-09-25 10:24:06,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:06,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:06,168 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:06,169 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-25 10:24:06,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:06,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:06,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:06,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:06,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917468703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:06,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2024-09-25 10:24:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959868068] [2024-09-25 10:24:06,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:06,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-25 10:24:06,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:06,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-25 10:24:06,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:24:06,828 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:07,088 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-25 10:24:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:07,090 INFO L225 Difference]: With dead ends: 205 [2024-09-25 10:24:07,090 INFO L226 Difference]: Without dead ends: 167 [2024-09-25 10:24:07,091 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 159 SyntacticMatches, 20 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:24:07,091 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:07,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 271 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-25 10:24:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-25 10:24:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:07,146 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:07,146 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:07,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:07,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:07,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:07,147 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:07,158 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-25 10:24:07,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-25 10:24:07,348 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:07,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 401447254, now seen corresponding path program 35 times [2024-09-25 10:24:07,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:07,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176897251] [2024-09-25 10:24:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:07,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:07,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176897251] [2024-09-25 10:24:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176897251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783014548] [2024-09-25 10:24:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:07,593 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:07,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-25 10:24:07,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-25 10:24:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:07,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:07,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:07,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:08,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783014548] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:08,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:08,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2024-09-25 10:24:08,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982615337] [2024-09-25 10:24:08,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:08,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 10:24:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 10:24:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:24:08,206 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:08,477 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-25 10:24:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:08,479 INFO L225 Difference]: With dead ends: 201 [2024-09-25 10:24:08,479 INFO L226 Difference]: Without dead ends: 163 [2024-09-25 10:24:08,479 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:24:08,480 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:08,480 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-25 10:24:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-25 10:24:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:08,534 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:08,534 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:08,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:08,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:08,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:08,535 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:08,547 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-09-25 10:24:08,735 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:08,736 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:08,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 233293239, now seen corresponding path program 36 times [2024-09-25 10:24:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595317866] [2024-09-25 10:24:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:08,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:08,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595317866] [2024-09-25 10:24:08,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595317866] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:08,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705732338] [2024-09-25 10:24:08,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:08,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:08,987 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:08,988 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-25 10:24:09,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-25 10:24:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:09,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:09,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:09,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705732338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:09,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2024-09-25 10:24:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011159281] [2024-09-25 10:24:09,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:09,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-25 10:24:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-25 10:24:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:24:09,618 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:09,853 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-25 10:24:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:09,856 INFO L225 Difference]: With dead ends: 195 [2024-09-25 10:24:09,856 INFO L226 Difference]: Without dead ends: 157 [2024-09-25 10:24:09,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 10:24:09,857 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:09,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-25 10:24:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-25 10:24:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-25 10:24:09,919 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-25 10:24:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:09,919 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-25 10:24:09,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:09,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-25 10:24:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-25 10:24:09,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:09,921 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:09,937 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-09-25 10:24:10,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:10,125 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:10,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1850341066, now seen corresponding path program 9 times [2024-09-25 10:24:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:10,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195980030] [2024-09-25 10:24:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:10,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:24:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:24:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:24:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:24:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:24:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:24:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:10,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195980030] [2024-09-25 10:24:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195980030] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:10,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090778888] [2024-09-25 10:24:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:10,370 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:10,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-25 10:24:10,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 10:24:10,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:10,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:24:10,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:10,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090778888] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:11,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2024-09-25 10:24:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546330531] [2024-09-25 10:24:11,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:11,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 10:24:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 10:24:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:24:11,004 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:11,196 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2024-09-25 10:24:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:24:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-25 10:24:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:11,198 INFO L225 Difference]: With dead ends: 190 [2024-09-25 10:24:11,198 INFO L226 Difference]: Without dead ends: 152 [2024-09-25 10:24:11,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 162 SyntacticMatches, 20 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:24:11,198 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:11,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:11,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-25 10:24:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2024-09-25 10:24:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2024-09-25 10:24:11,267 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 88 [2024-09-25 10:24:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:11,267 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2024-09-25 10:24:11,267 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:24:11,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2024-09-25 10:24:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-25 10:24:11,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:11,268 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:11,285 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:11,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-09-25 10:24:11,473 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:11,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1568569182, now seen corresponding path program 18 times [2024-09-25 10:24:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:11,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465771214] [2024-09-25 10:24:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 63 proven. 136 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:11,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:11,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465771214] [2024-09-25 10:24:11,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465771214] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:11,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066614988] [2024-09-25 10:24:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:11,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:11,626 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:11,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-25 10:24:11,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-25 10:24:11,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:11,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:11,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:11,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:24:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066614988] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:11,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:11,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2024-09-25 10:24:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672364949] [2024-09-25 10:24:11,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:11,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:24:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:24:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:24:11,881 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:24:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:12,012 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2024-09-25 10:24:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:24:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2024-09-25 10:24:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:12,013 INFO L225 Difference]: With dead ends: 125 [2024-09-25 10:24:12,013 INFO L226 Difference]: Without dead ends: 123 [2024-09-25 10:24:12,014 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 20 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:24:12,014 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:12,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 269 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-25 10:24:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2024-09-25 10:24:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2024-09-25 10:24:12,076 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 89 [2024-09-25 10:24:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:12,076 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2024-09-25 10:24:12,077 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:24:12,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2024-09-25 10:24:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:12,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:12,078 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:12,094 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:12,278 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:12,279 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:12,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 123844214, now seen corresponding path program 19 times [2024-09-25 10:24:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757493104] [2024-09-25 10:24:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757493104] [2024-09-25 10:24:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757493104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350392596] [2024-09-25 10:24:12,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:12,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:12,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:12,584 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:12,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-25 10:24:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:12,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:12,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:13,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350392596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:13,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-09-25 10:24:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223041713] [2024-09-25 10:24:13,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:13,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 10:24:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 10:24:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:24:13,441 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:13,738 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2024-09-25 10:24:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:13,740 INFO L225 Difference]: With dead ends: 204 [2024-09-25 10:24:13,740 INFO L226 Difference]: Without dead ends: 163 [2024-09-25 10:24:13,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 167 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:24:13,740 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:13,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 296 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-25 10:24:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2024-09-25 10:24:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:13,789 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:13,790 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:13,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:13,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:13,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:13,790 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:13,803 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:13,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:13,991 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:13,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1467016203, now seen corresponding path program 37 times [2024-09-25 10:24:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046727490] [2024-09-25 10:24:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046727490] [2024-09-25 10:24:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046727490] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482479844] [2024-09-25 10:24:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:14,315 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:14,316 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-25 10:24:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:14,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:14,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:14,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:15,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482479844] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:15,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:15,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2024-09-25 10:24:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088107159] [2024-09-25 10:24:15,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:15,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-25 10:24:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-25 10:24:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:24:15,155 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:15,448 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-25 10:24:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:15,450 INFO L225 Difference]: With dead ends: 213 [2024-09-25 10:24:15,450 INFO L226 Difference]: Without dead ends: 172 [2024-09-25 10:24:15,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=501, Invalid=2255, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:24:15,451 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:15,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-25 10:24:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-25 10:24:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:15,514 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:15,514 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:15,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:15,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:15,515 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:15,515 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:15,529 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-25 10:24:15,715 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-09-25 10:24:15,715 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1668254358, now seen corresponding path program 38 times [2024-09-25 10:24:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:15,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164917121] [2024-09-25 10:24:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:15,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:16,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164917121] [2024-09-25 10:24:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164917121] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649378056] [2024-09-25 10:24:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:16,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:16,027 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:16,028 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-25 10:24:16,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:16,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:16,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:16,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649378056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:16,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2024-09-25 10:24:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664922610] [2024-09-25 10:24:16,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:16,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-25 10:24:16,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-25 10:24:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:24:16,839 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:17,158 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-25 10:24:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:17,158 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:17,159 INFO L225 Difference]: With dead ends: 220 [2024-09-25 10:24:17,159 INFO L226 Difference]: Without dead ends: 179 [2024-09-25 10:24:17,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 169 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:24:17,160 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:17,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 269 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-25 10:24:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-25 10:24:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:17,218 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:17,218 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:17,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:17,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:17,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:17,219 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:17,236 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-25 10:24:17,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-25 10:24:17,420 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:17,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash 661013461, now seen corresponding path program 39 times [2024-09-25 10:24:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466017930] [2024-09-25 10:24:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:17,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466017930] [2024-09-25 10:24:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466017930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:17,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337121711] [2024-09-25 10:24:17,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:17,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:17,707 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:17,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-25 10:24:17,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-25 10:24:17,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:17,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:17,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:18,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337121711] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:18,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:18,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2024-09-25 10:24:18,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030906466] [2024-09-25 10:24:18,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:18,471 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-25 10:24:18,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:18,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-25 10:24:18,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:24:18,472 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:18,812 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-25 10:24:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:18,813 INFO L225 Difference]: With dead ends: 225 [2024-09-25 10:24:18,813 INFO L226 Difference]: Without dead ends: 184 [2024-09-25 10:24:18,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:24:18,814 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:18,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-25 10:24:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-25 10:24:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:18,886 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:18,886 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:18,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:18,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:18,887 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:18,887 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:18,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-25 10:24:19,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-25 10:24:19,088 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:19,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -618404170, now seen corresponding path program 40 times [2024-09-25 10:24:19,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:19,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481852172] [2024-09-25 10:24:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:19,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:19,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481852172] [2024-09-25 10:24:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481852172] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:19,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927610188] [2024-09-25 10:24:19,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:19,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:19,369 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:19,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-25 10:24:19,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:19,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:19,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:19,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:20,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927610188] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:20,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2024-09-25 10:24:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263670063] [2024-09-25 10:24:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:20,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:24:20,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:24:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:24:20,114 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:20,518 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-25 10:24:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:20,519 INFO L225 Difference]: With dead ends: 228 [2024-09-25 10:24:20,519 INFO L226 Difference]: Without dead ends: 187 [2024-09-25 10:24:20,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:24:20,520 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:20,520 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 436 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-25 10:24:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-25 10:24:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:20,581 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:20,581 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:20,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:20,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:20,582 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:20,582 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:20,594 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-09-25 10:24:20,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-25 10:24:20,783 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:20,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1213865035, now seen corresponding path program 41 times [2024-09-25 10:24:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174341459] [2024-09-25 10:24:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174341459] [2024-09-25 10:24:21,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174341459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123583575] [2024-09-25 10:24:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:21,063 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:21,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-25 10:24:21,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-25 10:24:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:21,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:21,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:21,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123583575] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:21,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2024-09-25 10:24:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600972560] [2024-09-25 10:24:21,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:21,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:24:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:24:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:24:21,797 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:22,202 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2024-09-25 10:24:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:22,203 INFO L225 Difference]: With dead ends: 229 [2024-09-25 10:24:22,203 INFO L226 Difference]: Without dead ends: 188 [2024-09-25 10:24:22,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:24:22,204 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:22,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 456 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-25 10:24:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 120. [2024-09-25 10:24:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:22,269 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:22,269 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:22,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:22,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:22,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:22,271 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:22,283 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:22,471 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:22,471 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:22,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1233073450, now seen corresponding path program 42 times [2024-09-25 10:24:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:22,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883820870] [2024-09-25 10:24:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:22,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883820870] [2024-09-25 10:24:22,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883820870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853412082] [2024-09-25 10:24:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:22,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:22,765 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:22,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-25 10:24:22,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-25 10:24:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:22,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:22,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:23,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853412082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:23,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2024-09-25 10:24:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965453160] [2024-09-25 10:24:23,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:23,480 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:24:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:24:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:23,481 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:23,951 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-25 10:24:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:23,954 INFO L225 Difference]: With dead ends: 228 [2024-09-25 10:24:23,954 INFO L226 Difference]: Without dead ends: 187 [2024-09-25 10:24:23,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 173 SyntacticMatches, 22 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:24:23,955 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:23,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-25 10:24:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-25 10:24:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:24,033 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:24,033 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:24,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:24,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:24,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:24,034 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:24,052 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:24,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:24,234 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:24,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash 151780245, now seen corresponding path program 43 times [2024-09-25 10:24:24,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:24,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898273792] [2024-09-25 10:24:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898273792] [2024-09-25 10:24:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898273792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924092943] [2024-09-25 10:24:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:24,598 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:24,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-25 10:24:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:24,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:24,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:25,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:25,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924092943] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:25,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:25,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2024-09-25 10:24:25,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420629755] [2024-09-25 10:24:25,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:25,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 10:24:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 10:24:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:24:25,431 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:25,735 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-25 10:24:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:25,737 INFO L225 Difference]: With dead ends: 225 [2024-09-25 10:24:25,737 INFO L226 Difference]: Without dead ends: 184 [2024-09-25 10:24:25,737 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 174 SyntacticMatches, 22 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:25,737 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:25,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 191 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-25 10:24:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-25 10:24:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:25,790 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:25,790 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:25,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:25,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:25,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:25,791 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:25,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-25 10:24:25,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:25,992 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:25,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1443378934, now seen corresponding path program 44 times [2024-09-25 10:24:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:25,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126844558] [2024-09-25 10:24:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:26,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126844558] [2024-09-25 10:24:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126844558] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375693948] [2024-09-25 10:24:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:26,302 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:26,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-25 10:24:26,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:26,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:26,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:26,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:26,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375693948] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:26,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2024-09-25 10:24:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305635758] [2024-09-25 10:24:26,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:26,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-25 10:24:26,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-25 10:24:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:24:26,978 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:27,337 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-25 10:24:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:27,338 INFO L225 Difference]: With dead ends: 220 [2024-09-25 10:24:27,338 INFO L226 Difference]: Without dead ends: 179 [2024-09-25 10:24:27,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:24:27,339 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:27,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 396 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-25 10:24:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-25 10:24:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:27,400 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:27,400 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:27,400 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:27,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:27,401 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:27,413 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-09-25 10:24:27,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:27,602 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:27,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1562997899, now seen corresponding path program 45 times [2024-09-25 10:24:27,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:27,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597781686] [2024-09-25 10:24:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597781686] [2024-09-25 10:24:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597781686] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202849336] [2024-09-25 10:24:27,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:27,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:27,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:27,872 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:27,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-25 10:24:27,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-25 10:24:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:27,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:27,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:28,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202849336] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:28,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:28,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2024-09-25 10:24:28,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134996691] [2024-09-25 10:24:28,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:28,554 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 10:24:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:28,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 10:24:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:24:28,555 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:28,869 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-25 10:24:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:28,870 INFO L225 Difference]: With dead ends: 213 [2024-09-25 10:24:28,871 INFO L226 Difference]: Without dead ends: 172 [2024-09-25 10:24:28,871 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-25 10:24:28,871 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:28,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 361 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-25 10:24:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-25 10:24:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-25 10:24:28,927 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-25 10:24:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:28,927 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-25 10:24:28,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:28,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-25 10:24:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-25 10:24:28,928 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:28,928 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:28,939 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:29,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:29,128 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:29,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1388063510, now seen corresponding path program 10 times [2024-09-25 10:24:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:29,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553392026] [2024-09-25 10:24:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:24:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:24:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:24:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:24:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:24:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:24:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:24:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:24:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:24:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:24:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:29,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553392026] [2024-09-25 10:24:29,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553392026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462146386] [2024-09-25 10:24:29,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:29,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:29,444 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:29,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-25 10:24:29,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:29,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:29,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:24:29,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:29,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462146386] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:30,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:30,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2024-09-25 10:24:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410072701] [2024-09-25 10:24:30,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:30,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-25 10:24:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-25 10:24:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:24:30,105 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:30,389 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2024-09-25 10:24:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-25 10:24:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-25 10:24:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:30,391 INFO L225 Difference]: With dead ends: 207 [2024-09-25 10:24:30,391 INFO L226 Difference]: Without dead ends: 166 [2024-09-25 10:24:30,391 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 177 SyntacticMatches, 22 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:24:30,391 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:30,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 334 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-25 10:24:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2024-09-25 10:24:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 97 states have internal predecessors, (110), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2024-09-25 10:24:30,453 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 96 [2024-09-25 10:24:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:30,453 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2024-09-25 10:24:30,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 10:24:30,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2024-09-25 10:24:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-25 10:24:30,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:30,454 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:30,467 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:30,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:30,655 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:30,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 949083873, now seen corresponding path program 20 times [2024-09-25 10:24:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:30,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192305057] [2024-09-25 10:24:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 75 proven. 166 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:30,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192305057] [2024-09-25 10:24:30,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192305057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421292653] [2024-09-25 10:24:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:30,818 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:30,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-25 10:24:30,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:30,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 10:24:30,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:30,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:24:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421292653] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:31,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2024-09-25 10:24:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378469726] [2024-09-25 10:24:31,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:31,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 10:24:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 10:24:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:24:31,113 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:31,271 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-09-25 10:24:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:24:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 97 [2024-09-25 10:24:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:31,272 INFO L225 Difference]: With dead ends: 135 [2024-09-25 10:24:31,272 INFO L226 Difference]: Without dead ends: 133 [2024-09-25 10:24:31,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 24 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:24:31,273 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:31,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 287 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-25 10:24:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2024-09-25 10:24:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 102 states have internal predecessors, (115), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2024-09-25 10:24:31,328 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 97 [2024-09-25 10:24:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:31,328 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2024-09-25 10:24:31,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:24:31,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2024-09-25 10:24:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:31,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:31,329 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:31,341 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-25 10:24:31,529 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-25 10:24:31,530 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:31,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1261524137, now seen corresponding path program 21 times [2024-09-25 10:24:31,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:31,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520129637] [2024-09-25 10:24:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:31,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520129637] [2024-09-25 10:24:31,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520129637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948854519] [2024-09-25 10:24:31,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:31,907 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:31,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-25 10:24:31,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-25 10:24:31,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:31,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:31,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:32,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948854519] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:32,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:32,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-25 10:24:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697993019] [2024-09-25 10:24:32,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:32,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-25 10:24:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-25 10:24:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:24:32,935 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:33,264 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2024-09-25 10:24:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:33,266 INFO L225 Difference]: With dead ends: 221 [2024-09-25 10:24:33,266 INFO L226 Difference]: Without dead ends: 177 [2024-09-25 10:24:33,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=617, Invalid=2689, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:24:33,266 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:33,266 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 325 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-25 10:24:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2024-09-25 10:24:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:33,331 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:33,331 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:33,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:33,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:33,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:33,332 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:33,343 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:33,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-25 10:24:33,532 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1723474390, now seen corresponding path program 46 times [2024-09-25 10:24:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674942413] [2024-09-25 10:24:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674942413] [2024-09-25 10:24:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674942413] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:33,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316234903] [2024-09-25 10:24:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:33,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:33,860 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:33,861 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-25 10:24:33,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:33,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:33,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:34,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:34,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316234903] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:34,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:34,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2024-09-25 10:24:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460844059] [2024-09-25 10:24:34,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:34,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:24:34,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:24:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:24:34,841 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:35,246 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-25 10:24:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:35,248 INFO L225 Difference]: With dead ends: 231 [2024-09-25 10:24:35,248 INFO L226 Difference]: Without dead ends: 187 [2024-09-25 10:24:35,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:24:35,249 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:35,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 372 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-25 10:24:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-25 10:24:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:35,327 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:35,327 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:35,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:35,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:35,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:35,328 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:35,343 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-09-25 10:24:35,529 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:35,529 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:35,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash -396992649, now seen corresponding path program 47 times [2024-09-25 10:24:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314797350] [2024-09-25 10:24:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:35,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:35,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:35,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314797350] [2024-09-25 10:24:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314797350] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912546671] [2024-09-25 10:24:35,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:35,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:35,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:35,853 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:35,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-25 10:24:35,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 10:24:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:35,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:35,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:36,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:36,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912546671] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:36,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:36,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2024-09-25 10:24:36,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801588870] [2024-09-25 10:24:36,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:36,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-25 10:24:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-25 10:24:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:24:36,807 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:37,376 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-25 10:24:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:37,379 INFO L225 Difference]: With dead ends: 239 [2024-09-25 10:24:37,379 INFO L226 Difference]: Without dead ends: 195 [2024-09-25 10:24:37,379 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=2533, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:24:37,379 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:37,380 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 356 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-25 10:24:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-25 10:24:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:37,476 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:37,476 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:37,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:37,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:37,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:37,477 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:37,493 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:37,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:37,678 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:37,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1197173174, now seen corresponding path program 48 times [2024-09-25 10:24:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164652293] [2024-09-25 10:24:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:37,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:37,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:38,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164652293] [2024-09-25 10:24:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164652293] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054455585] [2024-09-25 10:24:38,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:38,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:38,007 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:38,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-25 10:24:38,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-25 10:24:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:38,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:38,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:38,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054455585] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:38,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:38,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2024-09-25 10:24:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832513443] [2024-09-25 10:24:38,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:38,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-25 10:24:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-25 10:24:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:24:38,925 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:39,353 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-25 10:24:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:39,355 INFO L225 Difference]: With dead ends: 245 [2024-09-25 10:24:39,355 INFO L226 Difference]: Without dead ends: 201 [2024-09-25 10:24:39,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 184 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=2452, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:24:39,356 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:39,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-25 10:24:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-25 10:24:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:39,429 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:39,429 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:39,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:39,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:39,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:39,430 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:39,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:39,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:39,631 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:39,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1937990761, now seen corresponding path program 49 times [2024-09-25 10:24:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:39,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871928244] [2024-09-25 10:24:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871928244] [2024-09-25 10:24:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871928244] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501638412] [2024-09-25 10:24:39,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:39,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:39,948 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:39,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-25 10:24:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:39,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:39,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:40,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:40,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501638412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:40,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:40,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2024-09-25 10:24:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181124819] [2024-09-25 10:24:40,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:40,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 10:24:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 10:24:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:24:40,814 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:41,314 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-25 10:24:41,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:41,314 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:41,316 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:24:41,316 INFO L226 Difference]: Without dead ends: 205 [2024-09-25 10:24:41,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:24:41,317 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:41,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 333 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-25 10:24:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-25 10:24:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:41,404 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:41,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:41,404 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:41,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:41,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:41,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:41,405 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:41,417 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:41,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:41,605 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:41,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1701652886, now seen corresponding path program 50 times [2024-09-25 10:24:41,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:41,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400153167] [2024-09-25 10:24:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:41,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:41,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400153167] [2024-09-25 10:24:41,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400153167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:41,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386279622] [2024-09-25 10:24:41,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:41,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:41,934 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:41,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-25 10:24:41,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:41,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:41,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:41,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:42,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386279622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:42,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2024-09-25 10:24:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446659209] [2024-09-25 10:24:42,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:42,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-25 10:24:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-25 10:24:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:24:42,747 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:43,214 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-25 10:24:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:43,215 INFO L225 Difference]: With dead ends: 251 [2024-09-25 10:24:43,215 INFO L226 Difference]: Without dead ends: 207 [2024-09-25 10:24:43,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:24:43,216 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:43,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-25 10:24:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-25 10:24:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:43,289 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:43,289 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:43,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:43,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:43,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:43,290 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:43,304 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-09-25 10:24:43,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:43,491 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:43,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash -951885897, now seen corresponding path program 51 times [2024-09-25 10:24:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:43,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444921137] [2024-09-25 10:24:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444921137] [2024-09-25 10:24:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444921137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962066187] [2024-09-25 10:24:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:43,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:43,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:43,807 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:43,808 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-25 10:24:43,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-25 10:24:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:43,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:43,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:44,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:44,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962066187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:44,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:44,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2024-09-25 10:24:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128313100] [2024-09-25 10:24:44,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:44,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-25 10:24:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-25 10:24:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:24:44,611 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:45,061 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-25 10:24:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:45,061 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:45,062 INFO L225 Difference]: With dead ends: 251 [2024-09-25 10:24:45,062 INFO L226 Difference]: Without dead ends: 207 [2024-09-25 10:24:45,063 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 187 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=2197, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:24:45,063 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:45,063 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 267 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-25 10:24:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-25 10:24:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:45,175 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:45,175 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:45,175 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:45,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:45,176 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:45,192 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:45,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:45,377 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash -760389258, now seen corresponding path program 52 times [2024-09-25 10:24:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:45,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404831720] [2024-09-25 10:24:45,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:45,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:45,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404831720] [2024-09-25 10:24:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404831720] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993678851] [2024-09-25 10:24:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:45,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:45,749 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:45,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-25 10:24:45,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:45,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:45,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:45,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:46,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993678851] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:46,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2024-09-25 10:24:46,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806786189] [2024-09-25 10:24:46,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:46,552 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-25 10:24:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-25 10:24:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:24:46,553 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:47,066 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-25 10:24:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:47,068 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:24:47,068 INFO L226 Difference]: Without dead ends: 205 [2024-09-25 10:24:47,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 188 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:24:47,068 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:47,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-25 10:24:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-25 10:24:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:47,145 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:47,145 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:47,145 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:47,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:47,146 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:47,146 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:47,158 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:47,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,346 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:47,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1462545367, now seen corresponding path program 53 times [2024-09-25 10:24:47,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690742658] [2024-09-25 10:24:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:47,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690742658] [2024-09-25 10:24:47,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690742658] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:47,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440958082] [2024-09-25 10:24:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:47,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:47,664 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:47,666 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-25 10:24:47,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 10:24:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:47,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:47,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:48,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:48,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440958082] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:48,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:48,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2024-09-25 10:24:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206883964] [2024-09-25 10:24:48,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:48,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:24:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:24:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:24:48,452 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:48,924 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-25 10:24:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:48,926 INFO L225 Difference]: With dead ends: 245 [2024-09-25 10:24:48,926 INFO L226 Difference]: Without dead ends: 201 [2024-09-25 10:24:48,927 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 189 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:24:48,927 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:48,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 395 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-25 10:24:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-25 10:24:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:49,007 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:49,007 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:49,007 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:49,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:49,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:49,008 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:49,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-09-25 10:24:49,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:49,209 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:49,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:49,209 INFO L85 PathProgramCache]: Analyzing trace with hash -128315050, now seen corresponding path program 54 times [2024-09-25 10:24:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:49,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325045275] [2024-09-25 10:24:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:49,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325045275] [2024-09-25 10:24:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325045275] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:49,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133521182] [2024-09-25 10:24:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:49,625 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:49,627 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-25 10:24:49,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-25 10:24:49,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:49,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:49,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:50,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:50,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133521182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:50,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:50,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2024-09-25 10:24:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327944901] [2024-09-25 10:24:50,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:50,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 10:24:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 10:24:50,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:24:50,452 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:50,880 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-25 10:24:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:50,881 INFO L225 Difference]: With dead ends: 239 [2024-09-25 10:24:50,881 INFO L226 Difference]: Without dead ends: 195 [2024-09-25 10:24:50,882 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 24 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:24:50,882 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:50,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-25 10:24:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-25 10:24:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:50,977 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:50,977 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:50,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:50,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:50,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:50,978 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:50,990 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-09-25 10:24:51,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-09-25 10:24:51,179 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1288011785, now seen corresponding path program 55 times [2024-09-25 10:24:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8805385] [2024-09-25 10:24:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8805385] [2024-09-25 10:24:51,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8805385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654449936] [2024-09-25 10:24:51,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:51,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:51,524 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:51,525 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-25 10:24:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:51,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:51,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:51,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654449936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:52,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:52,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-09-25 10:24:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794176673] [2024-09-25 10:24:52,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:52,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:24:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:24:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:52,274 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:52,630 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-25 10:24:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:52,631 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:52,632 INFO L225 Difference]: With dead ends: 231 [2024-09-25 10:24:52,632 INFO L226 Difference]: Without dead ends: 187 [2024-09-25 10:24:52,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 191 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 10:24:52,633 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:52,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-25 10:24:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-25 10:24:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-25 10:24:52,719 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-25 10:24:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:52,719 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-25 10:24:52,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-25 10:24:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 10:24:52,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:52,720 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:52,737 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2024-09-25 10:24:52,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-09-25 10:24:52,920 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:52,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1999714614, now seen corresponding path program 11 times [2024-09-25 10:24:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:52,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216403166] [2024-09-25 10:24:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:24:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:24:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:24:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:24:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:24:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:24:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:24:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:24:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:24:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:24:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:24:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:53,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:53,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216403166] [2024-09-25 10:24:53,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216403166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084960898] [2024-09-25 10:24:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:53,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:53,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:53,239 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-25 10:24:53,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 10:24:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:53,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:24:53,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:53,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084960898] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:53,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-09-25 10:24:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648329696] [2024-09-25 10:24:53,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:53,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 10:24:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 10:24:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 10:24:53,992 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:54,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:54,381 INFO L93 Difference]: Finished difference Result 224 states and 263 transitions. [2024-09-25 10:24:54,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:24:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-25 10:24:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:54,382 INFO L225 Difference]: With dead ends: 224 [2024-09-25 10:24:54,382 INFO L226 Difference]: Without dead ends: 180 [2024-09-25 10:24:54,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 192 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:24:54,383 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:54,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 518 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-25 10:24:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 132. [2024-09-25 10:24:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 105 states have internal predecessors, (119), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:24:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2024-09-25 10:24:54,466 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 104 [2024-09-25 10:24:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:54,467 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2024-09-25 10:24:54,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:24:54,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2024-09-25 10:24:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-25 10:24:54,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:54,468 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:54,480 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-09-25 10:24:54,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:54,668 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:54,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1609644226, now seen corresponding path program 22 times [2024-09-25 10:24:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:54,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110024922] [2024-09-25 10:24:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:24:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:24:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:24:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:24:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:24:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:24:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:24:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:24:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:24:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:24:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:24:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 199 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:54,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:54,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110024922] [2024-09-25 10:24:54,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110024922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:54,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096358628] [2024-09-25 10:24:54,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:54,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:54,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:54,857 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:54,857 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-25 10:24:54,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:54,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:24:54,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:54,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:24:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096358628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:55,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2024-09-25 10:24:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016140834] [2024-09-25 10:24:55,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:55,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:24:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:24:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:24:55,204 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:55,382 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2024-09-25 10:24:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 10:24:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 105 [2024-09-25 10:24:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:55,384 INFO L225 Difference]: With dead ends: 145 [2024-09-25 10:24:55,384 INFO L226 Difference]: Without dead ends: 143 [2024-09-25 10:24:55,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 24 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:24:55,384 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:55,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 245 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-25 10:24:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-09-25 10:24:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 110 states have internal predecessors, (124), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:24:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2024-09-25 10:24:55,489 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 105 [2024-09-25 10:24:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:55,489 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2024-09-25 10:24:55,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:24:55,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2024-09-25 10:24:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:24:55,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:55,490 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:55,504 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:55,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:55,691 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:55,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -367943082, now seen corresponding path program 23 times [2024-09-25 10:24:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232266485] [2024-09-25 10:24:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:55,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:24:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:24:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:24:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:24:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:24:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:24:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:24:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:24:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:24:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:24:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:24:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:24:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232266485] [2024-09-25 10:24:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232266485] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669278069] [2024-09-25 10:24:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:56,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:56,070 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-25 10:24:56,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-25 10:24:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:56,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:24:56,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:56,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669278069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:57,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:57,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-09-25 10:24:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527513117] [2024-09-25 10:24:57,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:57,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-25 10:24:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-25 10:24:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:24:57,093 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:24:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:57,488 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2024-09-25 10:24:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:24:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:24:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:57,490 INFO L225 Difference]: With dead ends: 238 [2024-09-25 10:24:57,490 INFO L226 Difference]: Without dead ends: 191 [2024-09-25 10:24:57,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 195 SyntacticMatches, 26 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=3077, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:24:57,491 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:57,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 406 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-25 10:24:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 140. [2024-09-25 10:24:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:24:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:24:57,589 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:24:57,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:57,590 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:24:57,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:24:57,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:24:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:24:57,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:57,591 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:57,609 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-09-25 10:24:57,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:57,791 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:57,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1709561387, now seen corresponding path program 56 times [2024-09-25 10:24:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:57,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081686141] [2024-09-25 10:24:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:24:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:24:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:24:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:24:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:24:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:24:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:24:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:24:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:24:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:24:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:24:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:24:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:58,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:58,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081686141] [2024-09-25 10:24:58,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081686141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896013213] [2024-09-25 10:24:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:58,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:58,160 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:58,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-25 10:24:58,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:58,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:24:58,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:58,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:24:59,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896013213] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:59,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:59,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2024-09-25 10:24:59,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854845170] [2024-09-25 10:24:59,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:59,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-25 10:24:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-25 10:24:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:24:59,143 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:24:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:59,606 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-25 10:24:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:24:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:24:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:59,608 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:24:59,608 INFO L226 Difference]: Without dead ends: 202 [2024-09-25 10:24:59,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=2995, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:24:59,609 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:59,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:24:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-25 10:24:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-25 10:24:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:24:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:24:59,707 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:24:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:59,708 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:24:59,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:24:59,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:24:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:24:59,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:59,709 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:59,721 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:59,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:59,909 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:59,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1295201910, now seen corresponding path program 57 times [2024-09-25 10:24:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:59,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878241138] [2024-09-25 10:24:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878241138] [2024-09-25 10:25:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878241138] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614212108] [2024-09-25 10:25:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:00,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:00,275 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-25 10:25:00,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-25 10:25:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:00,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:00,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:00,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614212108] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:01,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2024-09-25 10:25:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471570030] [2024-09-25 10:25:01,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:01,250 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-25 10:25:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:01,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-25 10:25:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:25:01,251 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:01,785 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-25 10:25:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:01,787 INFO L225 Difference]: With dead ends: 258 [2024-09-25 10:25:01,787 INFO L226 Difference]: Without dead ends: 211 [2024-09-25 10:25:01,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 197 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:25:01,787 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:01,787 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 394 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-25 10:25:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-25 10:25:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:01,885 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:01,885 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:01,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:01,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:01,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:01,886 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:01,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-09-25 10:25:02,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:02,086 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:02,087 INFO L85 PathProgramCache]: Analyzing trace with hash 6656437, now seen corresponding path program 58 times [2024-09-25 10:25:02,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046939387] [2024-09-25 10:25:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046939387] [2024-09-25 10:25:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046939387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:02,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977413930] [2024-09-25 10:25:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:02,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:02,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:02,448 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:02,449 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-25 10:25:02,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:02,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:02,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:02,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:03,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:03,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977413930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:03,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:03,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2024-09-25 10:25:03,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772291757] [2024-09-25 10:25:03,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:03,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-25 10:25:03,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-25 10:25:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:25:03,432 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:04,266 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-25 10:25:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:04,269 INFO L225 Difference]: With dead ends: 265 [2024-09-25 10:25:04,269 INFO L226 Difference]: Without dead ends: 218 [2024-09-25 10:25:04,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 198 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=597, Invalid=2825, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:25:04,269 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:04,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 350 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:25:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-25 10:25:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-25 10:25:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:04,369 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:04,369 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:04,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:04,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:04,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:04,370 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:04,382 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:04,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:04,570 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:04,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -34909546, now seen corresponding path program 59 times [2024-09-25 10:25:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:04,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883530356] [2024-09-25 10:25:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:04,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883530356] [2024-09-25 10:25:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883530356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:04,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504108439] [2024-09-25 10:25:04,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:04,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:04,938 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:04,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-25 10:25:04,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-25 10:25:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:04,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:04,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:05,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504108439] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:05,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:05,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2024-09-25 10:25:05,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570354727] [2024-09-25 10:25:05,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:05,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-25 10:25:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-25 10:25:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:25:05,885 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:06,493 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-25 10:25:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:06,495 INFO L225 Difference]: With dead ends: 270 [2024-09-25 10:25:06,495 INFO L226 Difference]: Without dead ends: 223 [2024-09-25 10:25:06,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 26 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=569, Invalid=2737, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:25:06,496 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:06,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 307 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-25 10:25:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-25 10:25:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:06,602 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:06,602 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:06,602 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:06,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:06,603 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:06,614 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-09-25 10:25:06,803 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:06,803 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:06,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1210675605, now seen corresponding path program 60 times [2024-09-25 10:25:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127911475] [2024-09-25 10:25:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127911475] [2024-09-25 10:25:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127911475] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66401352] [2024-09-25 10:25:07,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:07,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:07,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:07,164 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:07,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-25 10:25:07,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 10:25:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:07,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:07,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:07,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66401352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:08,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2024-09-25 10:25:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825804126] [2024-09-25 10:25:08,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:08,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:25:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:25:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:25:08,155 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:08,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:08,808 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-25 10:25:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:08,809 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:08,811 INFO L225 Difference]: With dead ends: 273 [2024-09-25 10:25:08,811 INFO L226 Difference]: Without dead ends: 226 [2024-09-25 10:25:08,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 200 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=2647, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:25:08,811 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:08,812 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-25 10:25:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-25 10:25:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:08,931 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:08,931 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:08,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:08,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:08,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:08,932 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:08,944 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:09,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:09,132 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 3929782, now seen corresponding path program 61 times [2024-09-25 10:25:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975705665] [2024-09-25 10:25:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:09,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 212 proven. 76 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:09,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:09,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975705665] [2024-09-25 10:25:09,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975705665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:09,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595953679] [2024-09-25 10:25:09,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:09,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:09,493 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:09,495 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-25 10:25:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:09,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:09,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:10,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595953679] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:10,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:10,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2024-09-25 10:25:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831897041] [2024-09-25 10:25:10,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:10,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-25 10:25:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-25 10:25:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:25:10,434 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:11,084 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2024-09-25 10:25:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:11,086 INFO L225 Difference]: With dead ends: 274 [2024-09-25 10:25:11,086 INFO L226 Difference]: Without dead ends: 227 [2024-09-25 10:25:11,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 201 SyntacticMatches, 26 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=525, Invalid=2555, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:25:11,087 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:11,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-25 10:25:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 140. [2024-09-25 10:25:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:11,197 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:11,197 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:11,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:11,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:11,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:11,198 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:11,210 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:11,398 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-25 10:25:11,399 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:11,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -450639499, now seen corresponding path program 62 times [2024-09-25 10:25:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586829155] [2024-09-25 10:25:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:11,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:11,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586829155] [2024-09-25 10:25:11,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586829155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:11,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082367090] [2024-09-25 10:25:11,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:11,853 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:11,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-25 10:25:11,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:11,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:11,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:11,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:12,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:12,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082367090] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:12,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:12,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2024-09-25 10:25:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221077701] [2024-09-25 10:25:12,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:12,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-25 10:25:12,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-25 10:25:12,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:25:12,781 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:13,473 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-25 10:25:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:13,474 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:13,475 INFO L225 Difference]: With dead ends: 273 [2024-09-25 10:25:13,475 INFO L226 Difference]: Without dead ends: 226 [2024-09-25 10:25:13,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 202 SyntacticMatches, 26 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=2461, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:25:13,476 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:13,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 475 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-25 10:25:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-25 10:25:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:13,581 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:13,581 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:13,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:13,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:13,582 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:13,582 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:13,598 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-09-25 10:25:13,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2024-09-25 10:25:13,782 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:13,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1890001622, now seen corresponding path program 63 times [2024-09-25 10:25:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:13,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147285634] [2024-09-25 10:25:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:13,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:14,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147285634] [2024-09-25 10:25:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147285634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303417004] [2024-09-25 10:25:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:14,133 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:14,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-25 10:25:14,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-25 10:25:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:14,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:14,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:14,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303417004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:15,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:15,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2024-09-25 10:25:15,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552120944] [2024-09-25 10:25:15,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:15,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 10:25:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 10:25:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:25:15,011 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:15,650 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-25 10:25:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:15,652 INFO L225 Difference]: With dead ends: 270 [2024-09-25 10:25:15,652 INFO L226 Difference]: Without dead ends: 223 [2024-09-25 10:25:15,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 26 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:25:15,652 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:15,652 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-25 10:25:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-25 10:25:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:15,779 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:15,780 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:15,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:15,780 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:15,780 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:15,792 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:15,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:15,981 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:15,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 580032853, now seen corresponding path program 64 times [2024-09-25 10:25:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116590282] [2024-09-25 10:25:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:16,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116590282] [2024-09-25 10:25:16,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116590282] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929702010] [2024-09-25 10:25:16,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:16,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:16,331 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:16,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-25 10:25:16,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:16,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:16,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:16,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:17,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929702010] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:17,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:17,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2024-09-25 10:25:17,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471208997] [2024-09-25 10:25:17,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:17,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-25 10:25:17,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-25 10:25:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:25:17,186 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:17,769 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-25 10:25:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:17,772 INFO L225 Difference]: With dead ends: 265 [2024-09-25 10:25:17,772 INFO L226 Difference]: Without dead ends: 218 [2024-09-25 10:25:17,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 204 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:25:17,772 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:17,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-25 10:25:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-25 10:25:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:17,886 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:17,886 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:17,886 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:17,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:17,887 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:17,887 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:17,899 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-09-25 10:25:18,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-09-25 10:25:18,087 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:18,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1540434186, now seen corresponding path program 65 times [2024-09-25 10:25:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810477560] [2024-09-25 10:25:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:18,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810477560] [2024-09-25 10:25:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810477560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:18,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076511832] [2024-09-25 10:25:18,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:18,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:18,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:18,440 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:18,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-25 10:25:18,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-25 10:25:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:18,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:18,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:18,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:19,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076511832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:19,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:19,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2024-09-25 10:25:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920972748] [2024-09-25 10:25:19,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:19,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-25 10:25:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-25 10:25:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:25:19,284 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:19,849 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-25 10:25:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:19,851 INFO L225 Difference]: With dead ends: 258 [2024-09-25 10:25:19,851 INFO L226 Difference]: Without dead ends: 211 [2024-09-25 10:25:19,851 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 205 SyntacticMatches, 26 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=2167, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:25:19,851 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:19,851 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 299 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-25 10:25:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-25 10:25:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:19,965 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:19,965 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:19,965 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:19,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:19,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:19,966 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:19,978 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:20,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-25 10:25:20,166 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:20,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash 53731637, now seen corresponding path program 66 times [2024-09-25 10:25:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:20,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552581428] [2024-09-25 10:25:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:20,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552581428] [2024-09-25 10:25:20,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552581428] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208897936] [2024-09-25 10:25:20,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:20,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:20,531 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:20,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-25 10:25:20,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 10:25:20,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:20,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:20,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:21,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208897936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:21,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:21,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2024-09-25 10:25:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279407349] [2024-09-25 10:25:21,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:21,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-25 10:25:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-25 10:25:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:25:21,357 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:21,836 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-25 10:25:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:21,838 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:25:21,838 INFO L226 Difference]: Without dead ends: 202 [2024-09-25 10:25:21,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 206 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:25:21,839 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:21,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 306 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-25 10:25:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-25 10:25:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-25 10:25:21,957 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-25 10:25:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:21,957 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-25 10:25:21,958 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:21,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-25 10:25:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-25 10:25:21,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:21,959 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:21,976 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:22,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-25 10:25:22,160 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:22,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1213534998, now seen corresponding path program 12 times [2024-09-25 10:25:22,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:22,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384010795] [2024-09-25 10:25:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:22,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:25:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:25:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:25:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:25:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:25:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384010795] [2024-09-25 10:25:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384010795] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482153179] [2024-09-25 10:25:22,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:22,516 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:22,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-25 10:25:22,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 10:25:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:22,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:22,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:23,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:23,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482153179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:23,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:23,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2024-09-25 10:25:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360501461] [2024-09-25 10:25:23,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:23,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-25 10:25:23,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-25 10:25:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 10:25:23,350 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:23,751 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2024-09-25 10:25:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:25:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-25 10:25:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:23,753 INFO L225 Difference]: With dead ends: 241 [2024-09-25 10:25:23,753 INFO L226 Difference]: Without dead ends: 194 [2024-09-25 10:25:23,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 207 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 10:25:23,754 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:23,754 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 252 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-25 10:25:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 142. [2024-09-25 10:25:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 113 states have internal predecessors, (128), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:25:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2024-09-25 10:25:23,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 112 [2024-09-25 10:25:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:23,872 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2024-09-25 10:25:23,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:25:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2024-09-25 10:25:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-25 10:25:23,873 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:23,873 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:23,885 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-09-25 10:25:24,073 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-25 10:25:24,073 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:24,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:24,074 INFO L85 PathProgramCache]: Analyzing trace with hash -51276607, now seen corresponding path program 24 times [2024-09-25 10:25:24,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:24,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185389069] [2024-09-25 10:25:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 102 proven. 235 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:24,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:24,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185389069] [2024-09-25 10:25:24,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185389069] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:24,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391624793] [2024-09-25 10:25:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:24,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:24,293 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:24,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-25 10:25:24,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 10:25:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:24,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:24,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:24,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:25:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391624793] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:24,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:24,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2024-09-25 10:25:24,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808021682] [2024-09-25 10:25:24,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:24,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:25:24,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:24,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:25:24,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:25:24,632 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:25:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:24,862 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2024-09-25 10:25:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:25:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 113 [2024-09-25 10:25:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:24,864 INFO L225 Difference]: With dead ends: 155 [2024-09-25 10:25:24,864 INFO L226 Difference]: Without dead ends: 153 [2024-09-25 10:25:24,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 26 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:25:24,864 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:24,864 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-25 10:25:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-09-25 10:25:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 118 states have internal predecessors, (133), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2024-09-25 10:25:24,973 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 113 [2024-09-25 10:25:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:24,973 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2024-09-25 10:25:24,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:25:24,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2024-09-25 10:25:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:24,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:24,974 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:25,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-25 10:25:25,175 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:25,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 827365751, now seen corresponding path program 25 times [2024-09-25 10:25:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170243567] [2024-09-25 10:25:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170243567] [2024-09-25 10:25:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170243567] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798264994] [2024-09-25 10:25:25,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:25,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:25,600 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-25 10:25:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:25,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:25,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:26,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798264994] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:26,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-09-25 10:25:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198677504] [2024-09-25 10:25:26,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:26,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-25 10:25:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-25 10:25:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 10:25:26,762 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:27,187 INFO L93 Difference]: Finished difference Result 255 states and 299 transitions. [2024-09-25 10:25:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:27,189 INFO L225 Difference]: With dead ends: 255 [2024-09-25 10:25:27,189 INFO L226 Difference]: Without dead ends: 205 [2024-09-25 10:25:27,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 209 SyntacticMatches, 28 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2024-09-25 10:25:27,190 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:27,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-25 10:25:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2024-09-25 10:25:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:27,318 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:27,318 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:27,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:27,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:27,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:27,319 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:27,331 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-09-25 10:25:27,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:27,520 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:27,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -36359690, now seen corresponding path program 67 times [2024-09-25 10:25:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:27,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820046568] [2024-09-25 10:25:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820046568] [2024-09-25 10:25:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820046568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018093684] [2024-09-25 10:25:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:27,950 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-25 10:25:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:28,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:28,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018093684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:29,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:29,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2024-09-25 10:25:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258597402] [2024-09-25 10:25:29,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:29,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-25 10:25:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-25 10:25:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 10:25:29,062 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:29,682 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-25 10:25:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:29,684 INFO L225 Difference]: With dead ends: 267 [2024-09-25 10:25:29,684 INFO L226 Difference]: Without dead ends: 217 [2024-09-25 10:25:29,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 210 SyntacticMatches, 28 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=756, Invalid=3404, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 10:25:29,685 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:29,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 485 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-25 10:25:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-25 10:25:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:29,814 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:29,814 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:29,814 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:29,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:29,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:29,815 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:29,827 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:30,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-25 10:25:30,016 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:30,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash -64221801, now seen corresponding path program 68 times [2024-09-25 10:25:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:30,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332712367] [2024-09-25 10:25:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:30,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332712367] [2024-09-25 10:25:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332712367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:30,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497394030] [2024-09-25 10:25:30,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:30,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:30,545 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:30,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-25 10:25:30,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:30,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:30,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:31,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:31,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497394030] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:31,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:31,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2024-09-25 10:25:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453165579] [2024-09-25 10:25:31,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:31,633 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-25 10:25:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-25 10:25:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:25:31,634 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:32,322 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-25 10:25:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:32,324 INFO L225 Difference]: With dead ends: 277 [2024-09-25 10:25:32,324 INFO L226 Difference]: Without dead ends: 227 [2024-09-25 10:25:32,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 211 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=717, Invalid=3315, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 10:25:32,325 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:32,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 388 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-25 10:25:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-25 10:25:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:32,471 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:32,471 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:32,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:32,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:32,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:32,472 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:32,483 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-09-25 10:25:32,672 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:32,673 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:32,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash 766163414, now seen corresponding path program 69 times [2024-09-25 10:25:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:32,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298955487] [2024-09-25 10:25:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298955487] [2024-09-25 10:25:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298955487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95813098] [2024-09-25 10:25:33,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:33,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:33,074 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:33,075 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-25 10:25:33,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-25 10:25:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:33,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:33,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:33,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95813098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:34,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:34,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2024-09-25 10:25:34,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001123783] [2024-09-25 10:25:34,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:34,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-25 10:25:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-25 10:25:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:25:34,136 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:34,973 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-25 10:25:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:34,974 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:34,975 INFO L225 Difference]: With dead ends: 285 [2024-09-25 10:25:34,975 INFO L226 Difference]: Without dead ends: 235 [2024-09-25 10:25:34,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=3224, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:25:34,976 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:34,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 532 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:25:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-25 10:25:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-25 10:25:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:35,117 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:35,117 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:35,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:35,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:35,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:35,118 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:35,130 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-09-25 10:25:35,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:35,319 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2039876023, now seen corresponding path program 70 times [2024-09-25 10:25:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499133651] [2024-09-25 10:25:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:35,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499133651] [2024-09-25 10:25:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499133651] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894886689] [2024-09-25 10:25:35,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:35,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:35,757 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:35,758 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-25 10:25:35,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:35,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:35,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:36,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894886689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:36,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2024-09-25 10:25:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298474102] [2024-09-25 10:25:36,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:36,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-25 10:25:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-25 10:25:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:25:36,811 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:37,646 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-25 10:25:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:37,649 INFO L225 Difference]: With dead ends: 291 [2024-09-25 10:25:37,649 INFO L226 Difference]: Without dead ends: 241 [2024-09-25 10:25:37,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 213 SyntacticMatches, 28 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=651, Invalid=3131, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:25:37,649 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:37,649 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 415 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-25 10:25:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-25 10:25:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:37,792 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:37,792 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:37,792 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:37,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:37,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:37,793 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:37,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-09-25 10:25:37,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-25 10:25:37,993 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1526774198, now seen corresponding path program 71 times [2024-09-25 10:25:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477702620] [2024-09-25 10:25:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:38,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:38,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477702620] [2024-09-25 10:25:38,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477702620] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:38,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083500792] [2024-09-25 10:25:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:38,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:38,396 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:38,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-25 10:25:38,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-25 10:25:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:38,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:38,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:39,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:39,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083500792] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:39,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2024-09-25 10:25:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244712400] [2024-09-25 10:25:39,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:39,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-25 10:25:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-25 10:25:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:25:39,435 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:40,330 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-25 10:25:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:40,330 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:40,332 INFO L225 Difference]: With dead ends: 295 [2024-09-25 10:25:40,332 INFO L226 Difference]: Without dead ends: 245 [2024-09-25 10:25:40,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 214 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:25:40,332 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:40,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 483 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:40,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-25 10:25:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-25 10:25:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:40,477 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:40,477 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:40,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:40,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:40,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:40,478 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:40,490 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-09-25 10:25:40,679 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-09-25 10:25:40,679 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:40,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1953460777, now seen corresponding path program 72 times [2024-09-25 10:25:40,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:40,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230268851] [2024-09-25 10:25:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230268851] [2024-09-25 10:25:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230268851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:41,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635729050] [2024-09-25 10:25:41,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:41,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:41,082 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:41,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-09-25 10:25:41,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-25 10:25:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:41,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:41,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:41,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635729050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:42,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2024-09-25 10:25:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554529803] [2024-09-25 10:25:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:42,226 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-25 10:25:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-25 10:25:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:25:42,227 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:43,127 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-25 10:25:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:43,129 INFO L225 Difference]: With dead ends: 297 [2024-09-25 10:25:43,129 INFO L226 Difference]: Without dead ends: 247 [2024-09-25 10:25:43,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 215 SyntacticMatches, 28 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=2939, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:25:43,130 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:43,130 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 432 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-25 10:25:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-25 10:25:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:43,285 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:43,285 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:43,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:43,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:43,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:43,286 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:43,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2024-09-25 10:25:43,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:43,486 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:43,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1536504214, now seen corresponding path program 73 times [2024-09-25 10:25:43,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:43,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967302494] [2024-09-25 10:25:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:43,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967302494] [2024-09-25 10:25:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967302494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523689873] [2024-09-25 10:25:43,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:43,879 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:43,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-09-25 10:25:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:43,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:43,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:44,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523689873] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:44,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2024-09-25 10:25:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908034803] [2024-09-25 10:25:44,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:44,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-25 10:25:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-25 10:25:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:25:44,867 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:45,762 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-25 10:25:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:45,764 INFO L225 Difference]: With dead ends: 297 [2024-09-25 10:25:45,764 INFO L226 Difference]: Without dead ends: 247 [2024-09-25 10:25:45,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 28 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=582, Invalid=2840, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:25:45,765 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:45,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 381 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-25 10:25:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-25 10:25:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:45,931 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:45,932 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:45,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:45,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:45,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:45,932 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:45,944 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-09-25 10:25:46,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-25 10:25:46,133 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:46,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1398957577, now seen corresponding path program 74 times [2024-09-25 10:25:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470682607] [2024-09-25 10:25:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:46,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470682607] [2024-09-25 10:25:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470682607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277685855] [2024-09-25 10:25:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:46,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:46,526 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-09-25 10:25:46,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:46,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:46,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:47,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:47,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277685855] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:47,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:47,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2024-09-25 10:25:47,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407387284] [2024-09-25 10:25:47,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:47,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-25 10:25:47,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:47,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-25 10:25:47,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:25:47,493 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:48,386 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-25 10:25:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:48,388 INFO L225 Difference]: With dead ends: 295 [2024-09-25 10:25:48,388 INFO L226 Difference]: Without dead ends: 245 [2024-09-25 10:25:48,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 217 SyntacticMatches, 28 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=2739, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:25:48,389 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:48,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-25 10:25:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-25 10:25:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:48,538 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:48,538 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:48,539 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:48,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:48,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:48,539 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:48,551 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:48,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2024-09-25 10:25:48,740 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:48,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1554391414, now seen corresponding path program 75 times [2024-09-25 10:25:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648429847] [2024-09-25 10:25:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:49,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648429847] [2024-09-25 10:25:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648429847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527309937] [2024-09-25 10:25:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:49,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:49,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:49,126 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:49,127 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-09-25 10:25:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-25 10:25:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:49,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:49,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:49,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527309937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:50,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2024-09-25 10:25:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344422430] [2024-09-25 10:25:50,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:50,085 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:25:50,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:25:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:25:50,086 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:50,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:50,921 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-25 10:25:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:50,922 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:50,923 INFO L225 Difference]: With dead ends: 291 [2024-09-25 10:25:50,923 INFO L226 Difference]: Without dead ends: 241 [2024-09-25 10:25:50,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 218 SyntacticMatches, 28 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:25:50,924 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:50,924 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 393 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-25 10:25:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-25 10:25:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:51,074 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:51,074 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:51,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:51,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:51,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:51,075 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:51,087 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-09-25 10:25:51,276 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-25 10:25:51,276 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 264187415, now seen corresponding path program 76 times [2024-09-25 10:25:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41829402] [2024-09-25 10:25:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41829402] [2024-09-25 10:25:51,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41829402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192920032] [2024-09-25 10:25:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:51,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:51,667 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:51,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-09-25 10:25:51,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:51,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:51,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:51,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:52,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192920032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:52,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:52,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2024-09-25 10:25:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657653654] [2024-09-25 10:25:52,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:52,602 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-25 10:25:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-25 10:25:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:25:52,603 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:53,380 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-25 10:25:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:53,382 INFO L225 Difference]: With dead ends: 285 [2024-09-25 10:25:53,382 INFO L226 Difference]: Without dead ends: 235 [2024-09-25 10:25:53,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 219 SyntacticMatches, 28 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=549, Invalid=2531, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:25:53,383 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:53,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-25 10:25:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-25 10:25:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:53,549 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:53,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:53,549 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:53,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:53,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:53,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:53,550 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:53,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:53,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-25 10:25:53,750 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:53,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1024358058, now seen corresponding path program 77 times [2024-09-25 10:25:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:53,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807520864] [2024-09-25 10:25:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:54,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:54,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807520864] [2024-09-25 10:25:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807520864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:54,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729759945] [2024-09-25 10:25:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:54,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:54,141 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-09-25 10:25:54,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-25 10:25:54,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:54,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:54,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:54,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729759945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:55,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2024-09-25 10:25:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124968270] [2024-09-25 10:25:55,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:55,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-25 10:25:55,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-25 10:25:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:25:55,069 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:55,750 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-25 10:25:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:55,752 INFO L225 Difference]: With dead ends: 277 [2024-09-25 10:25:55,752 INFO L226 Difference]: Without dead ends: 227 [2024-09-25 10:25:55,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 220 SyntacticMatches, 28 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=2424, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:25:55,752 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:55,752 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-25 10:25:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-25 10:25:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:55,901 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:55,902 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:55,902 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:55,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:55,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:55,902 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:55,914 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-09-25 10:25:56,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-09-25 10:25:56,103 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1065924041, now seen corresponding path program 78 times [2024-09-25 10:25:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:56,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219211914] [2024-09-25 10:25:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:56,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:56,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219211914] [2024-09-25 10:25:56,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219211914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:56,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708498050] [2024-09-25 10:25:56,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:56,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:56,559 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:56,559 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-09-25 10:25:56,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-25 10:25:56,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:56,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:56,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:57,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708498050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:57,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:57,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2024-09-25 10:25:57,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367658488] [2024-09-25 10:25:57,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:57,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-25 10:25:57,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-25 10:25:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:25:57,467 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:58,077 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-25 10:25:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:58,078 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:25:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:58,080 INFO L225 Difference]: With dead ends: 267 [2024-09-25 10:25:58,080 INFO L226 Difference]: Without dead ends: 217 [2024-09-25 10:25:58,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 221 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=2315, Unknown=0, NotChecked=0, Total=2862 [2024-09-25 10:25:58,080 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:58,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-25 10:25:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-25 10:25:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:25:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-25 10:25:58,250 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-25 10:25:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:58,250 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-25 10:25:58,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:25:58,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-25 10:25:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:25:58,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:58,251 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:58,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2024-09-25 10:25:58,451 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:58,451 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:58,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 179661110, now seen corresponding path program 13 times [2024-09-25 10:25:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652797201] [2024-09-25 10:25:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:25:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:25:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:25:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:25:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:25:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652797201] [2024-09-25 10:25:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652797201] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416861808] [2024-09-25 10:25:58,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:58,850 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:58,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-09-25 10:25:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:58,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:25:58,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:59,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:25:59,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416861808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:59,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:59,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2024-09-25 10:25:59,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125403111] [2024-09-25 10:25:59,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:59,799 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-25 10:25:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-25 10:25:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 10:25:59,800 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:26:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:00,322 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2024-09-25 10:26:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:26:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-25 10:26:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:00,324 INFO L225 Difference]: With dead ends: 258 [2024-09-25 10:26:00,324 INFO L226 Difference]: Without dead ends: 208 [2024-09-25 10:26:00,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=552, Invalid=2204, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:26:00,324 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:00,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 389 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-09-25 10:26:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 152. [2024-09-25 10:26:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 121 states have internal predecessors, (137), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:26:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2024-09-25 10:26:00,487 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 120 [2024-09-25 10:26:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:00,487 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2024-09-25 10:26:00,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:26:00,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2024-09-25 10:26:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-25 10:26:00,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:00,488 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:00,499 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2024-09-25 10:26:00,688 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:00,688 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:00,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1632046878, now seen corresponding path program 26 times [2024-09-25 10:26:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:00,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146565436] [2024-09-25 10:26:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:00,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 117 proven. 274 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:26:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146565436] [2024-09-25 10:26:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146565436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999668521] [2024-09-25 10:26:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:00,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:00,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:00,920 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:00,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-09-25 10:26:00,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:00,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:00,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-25 10:26:00,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:26:01,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:26:01,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999668521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:01,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:01,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2024-09-25 10:26:01,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704948648] [2024-09-25 10:26:01,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:01,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 10:26:01,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 10:26:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:26:01,292 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:26:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:01,594 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2024-09-25 10:26:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 10:26:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 121 [2024-09-25 10:26:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:01,596 INFO L225 Difference]: With dead ends: 165 [2024-09-25 10:26:01,596 INFO L226 Difference]: Without dead ends: 163 [2024-09-25 10:26:01,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 251 SyntacticMatches, 30 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:26:01,596 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:01,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 317 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:26:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-25 10:26:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2024-09-25 10:26:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.136) internal successors, (142), 126 states have internal predecessors, (142), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2024-09-25 10:26:01,752 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 121 [2024-09-25 10:26:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:01,752 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2024-09-25 10:26:01,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:26:01,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2024-09-25 10:26:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:01,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:01,753 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:01,765 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:01,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-09-25 10:26:01,954 INFO L399 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:01,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1580169674, now seen corresponding path program 27 times [2024-09-25 10:26:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:01,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404856445] [2024-09-25 10:26:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:02,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404856445] [2024-09-25 10:26:02,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404856445] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631436744] [2024-09-25 10:26:02,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:26:02,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:02,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:02,416 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:02,417 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-09-25 10:26:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-25 10:26:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:02,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:02,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:03,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631436744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:03,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-25 10:26:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894685362] [2024-09-25 10:26:03,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:03,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-25 10:26:03,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-25 10:26:03,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:26:03,678 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:04,257 INFO L93 Difference]: Finished difference Result 272 states and 319 transitions. [2024-09-25 10:26:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:04,259 INFO L225 Difference]: With dead ends: 272 [2024-09-25 10:26:04,259 INFO L226 Difference]: Without dead ends: 219 [2024-09-25 10:26:04,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 223 SyntacticMatches, 30 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=899, Invalid=3931, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:26:04,259 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:04,259 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 320 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-25 10:26:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2024-09-25 10:26:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:04,439 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:04,439 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:04,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:04,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:04,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:04,440 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:04,451 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2024-09-25 10:26:04,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2024-09-25 10:26:04,640 INFO L399 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:04,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash -634376267, now seen corresponding path program 79 times [2024-09-25 10:26:04,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:04,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723554354] [2024-09-25 10:26:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:04,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723554354] [2024-09-25 10:26:05,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723554354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:05,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863456358] [2024-09-25 10:26:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:26:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:05,105 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:05,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-09-25 10:26:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:05,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:05,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:05,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:06,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863456358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:06,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2024-09-25 10:26:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480382428] [2024-09-25 10:26:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:06,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-25 10:26:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-25 10:26:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 10:26:06,337 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:07,167 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-25 10:26:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:07,170 INFO L225 Difference]: With dead ends: 285 [2024-09-25 10:26:07,170 INFO L226 Difference]: Without dead ends: 232 [2024-09-25 10:26:07,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 224 SyntacticMatches, 30 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=853, Invalid=3839, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:26:07,170 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:07,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 514 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-25 10:26:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-25 10:26:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:07,427 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:07,427 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:07,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:07,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:07,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:07,428 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:07,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:07,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:07,629 INFO L399 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:07,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -326772138, now seen corresponding path program 80 times [2024-09-25 10:26:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392098525] [2024-09-25 10:26:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392098525] [2024-09-25 10:26:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392098525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:08,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270061392] [2024-09-25 10:26:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:08,087 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:08,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-09-25 10:26:08,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:08,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:08,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:08,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:09,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270061392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:09,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:09,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2024-09-25 10:26:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141113375] [2024-09-25 10:26:09,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:09,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-25 10:26:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-25 10:26:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 10:26:09,298 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:10,229 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-25 10:26:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:10,231 INFO L225 Difference]: With dead ends: 296 [2024-09-25 10:26:10,231 INFO L226 Difference]: Without dead ends: 243 [2024-09-25 10:26:10,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 225 SyntacticMatches, 30 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=811, Invalid=3745, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 10:26:10,232 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:10,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 502 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-25 10:26:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-25 10:26:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:10,418 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:10,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:10,419 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:10,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:10,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:10,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:10,419 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:10,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-09-25 10:26:10,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:10,620 INFO L399 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:10,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 930076565, now seen corresponding path program 81 times [2024-09-25 10:26:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:10,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552770983] [2024-09-25 10:26:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552770983] [2024-09-25 10:26:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552770983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218246321] [2024-09-25 10:26:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:26:11,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:11,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:11,082 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-09-25 10:26:11,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-25 10:26:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:11,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:11,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:11,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218246321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:12,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:12,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2024-09-25 10:26:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775840616] [2024-09-25 10:26:12,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:12,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-25 10:26:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-25 10:26:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2024-09-25 10:26:12,284 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:13,313 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-25 10:26:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:13,315 INFO L225 Difference]: With dead ends: 305 [2024-09-25 10:26:13,315 INFO L226 Difference]: Without dead ends: 252 [2024-09-25 10:26:13,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 226 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 10:26:13,315 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:13,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-25 10:26:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-25 10:26:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:13,528 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:13,529 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:13,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:13,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:13,529 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:13,529 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:13,541 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2024-09-25 10:26:13,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:13,730 INFO L399 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:13,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash -691947914, now seen corresponding path program 82 times [2024-09-25 10:26:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527272472] [2024-09-25 10:26:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:14,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:14,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527272472] [2024-09-25 10:26:14,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527272472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:14,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741586980] [2024-09-25 10:26:14,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:26:14,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:14,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:14,175 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:14,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-09-25 10:26:14,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:26:14,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:14,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:14,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:14,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:15,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741586980] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:15,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:15,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2024-09-25 10:26:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249841614] [2024-09-25 10:26:15,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:15,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-25 10:26:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-25 10:26:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 10:26:15,321 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:16,416 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-25 10:26:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:16,418 INFO L225 Difference]: With dead ends: 312 [2024-09-25 10:26:16,418 INFO L226 Difference]: Without dead ends: 259 [2024-09-25 10:26:16,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 227 SyntacticMatches, 30 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=739, Invalid=3551, Unknown=0, NotChecked=0, Total=4290 [2024-09-25 10:26:16,418 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:16,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-25 10:26:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-25 10:26:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:16,616 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:16,616 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:16,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:16,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:16,617 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:16,629 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:16,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,124 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:16,818 INFO L399 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:16,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash 641202037, now seen corresponding path program 83 times [2024-09-25 10:26:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551312167] [2024-09-25 10:26:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:17,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551312167] [2024-09-25 10:26:17,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551312167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770373434] [2024-09-25 10:26:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:26:17,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:17,263 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:17,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-09-25 10:26:17,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-25 10:26:17,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:17,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:17,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:18,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770373434] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:18,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:18,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2024-09-25 10:26:18,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596105062] [2024-09-25 10:26:18,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:18,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-25 10:26:18,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-25 10:26:18,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 10:26:18,404 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:19,644 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-25 10:26:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:19,644 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:19,646 INFO L225 Difference]: With dead ends: 317 [2024-09-25 10:26:19,646 INFO L226 Difference]: Without dead ends: 264 [2024-09-25 10:26:19,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 228 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=3451, Unknown=0, NotChecked=0, Total=4160 [2024-09-25 10:26:19,647 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:19,647 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 550 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-25 10:26:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-25 10:26:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:19,849 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:19,849 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:19,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:19,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:19,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:19,850 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:19,862 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2024-09-25 10:26:20,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-09-25 10:26:20,051 INFO L399 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:20,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash 545659542, now seen corresponding path program 84 times [2024-09-25 10:26:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:20,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101237354] [2024-09-25 10:26:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:20,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101237354] [2024-09-25 10:26:20,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101237354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23545846] [2024-09-25 10:26:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:26:20,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:20,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:20,599 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:20,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-09-25 10:26:20,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-25 10:26:20,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:20,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:20,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:21,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:21,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23545846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:21,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2024-09-25 10:26:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102482562] [2024-09-25 10:26:21,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:21,725 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-25 10:26:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-25 10:26:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:26:21,726 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:22,971 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-25 10:26:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:22,974 INFO L225 Difference]: With dead ends: 320 [2024-09-25 10:26:22,974 INFO L226 Difference]: Without dead ends: 267 [2024-09-25 10:26:22,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 229 SyntacticMatches, 30 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=683, Invalid=3349, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 10:26:22,974 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:22,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 487 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-25 10:26:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-25 10:26:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:23,191 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:23,191 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:23,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:23,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:23,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:23,192 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:23,204 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2024-09-25 10:26:23,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-09-25 10:26:23,392 INFO L399 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:23,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -565801131, now seen corresponding path program 85 times [2024-09-25 10:26:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:23,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155180983] [2024-09-25 10:26:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 96 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155180983] [2024-09-25 10:26:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155180983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429694590] [2024-09-25 10:26:23,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:26:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:23,842 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:23,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-09-25 10:26:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:23,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:23,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:24,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429694590] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:24,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:24,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2024-09-25 10:26:24,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197347929] [2024-09-25 10:26:24,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:24,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-25 10:26:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-25 10:26:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:26:24,977 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:26,285 INFO L93 Difference]: Finished difference Result 321 states and 368 transitions. [2024-09-25 10:26:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:26,288 INFO L225 Difference]: With dead ends: 321 [2024-09-25 10:26:26,288 INFO L226 Difference]: Without dead ends: 268 [2024-09-25 10:26:26,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 230 SyntacticMatches, 30 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=661, Invalid=3245, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:26:26,288 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:26,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 330 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-09-25 10:26:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 160. [2024-09-25 10:26:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:26,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:26,510 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:26,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:26,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:26,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:26,511 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:26,524 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2024-09-25 10:26:26,712 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:26,712 INFO L399 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:26,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1571486026, now seen corresponding path program 86 times [2024-09-25 10:26:26,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:26,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120073214] [2024-09-25 10:26:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120073214] [2024-09-25 10:26:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120073214] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985924703] [2024-09-25 10:26:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:27,163 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-09-25 10:26:27,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:27,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:27,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:27,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:27,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:28,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985924703] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:28,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:28,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2024-09-25 10:26:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200772812] [2024-09-25 10:26:28,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:28,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-25 10:26:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-25 10:26:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:26:28,271 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:29,616 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-25 10:26:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:29,619 INFO L225 Difference]: With dead ends: 320 [2024-09-25 10:26:29,619 INFO L226 Difference]: Without dead ends: 267 [2024-09-25 10:26:29,620 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 231 SyntacticMatches, 30 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=643, Invalid=3139, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:26:29,620 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:29,620 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-25 10:26:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-25 10:26:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:29,832 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:29,832 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:29,833 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:29,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:29,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:29,834 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:29,846 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2024-09-25 10:26:30,034 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:30,034 INFO L399 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:30,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1859755829, now seen corresponding path program 87 times [2024-09-25 10:26:30,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:30,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032858075] [2024-09-25 10:26:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:30,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:30,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032858075] [2024-09-25 10:26:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032858075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529283530] [2024-09-25 10:26:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:26:30,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:30,478 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:30,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-09-25 10:26:30,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-25 10:26:30,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:30,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:30,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:31,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:31,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529283530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:31,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:31,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2024-09-25 10:26:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529833843] [2024-09-25 10:26:31,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:31,602 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-25 10:26:31,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-25 10:26:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:26:31,604 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:32,916 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-25 10:26:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:32,916 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:32,918 INFO L225 Difference]: With dead ends: 317 [2024-09-25 10:26:32,918 INFO L226 Difference]: Without dead ends: 264 [2024-09-25 10:26:32,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 232 SyntacticMatches, 30 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=629, Invalid=3031, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:26:32,919 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:32,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 444 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-25 10:26:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-25 10:26:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:33,133 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:33,134 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:33,134 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:33,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:33,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:33,134 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:33,146 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:33,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-09-25 10:26:33,335 INFO L399 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:33,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1831893718, now seen corresponding path program 88 times [2024-09-25 10:26:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:33,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941804997] [2024-09-25 10:26:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941804997] [2024-09-25 10:26:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941804997] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052473729] [2024-09-25 10:26:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:26:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:33,784 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:33,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-09-25 10:26:33,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:26:33,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:33,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:33,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:34,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:34,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052473729] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:34,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:34,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2024-09-25 10:26:34,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717475646] [2024-09-25 10:26:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:34,846 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-25 10:26:34,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-25 10:26:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:26:34,847 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:36,065 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-25 10:26:36,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:36,065 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:36,067 INFO L225 Difference]: With dead ends: 312 [2024-09-25 10:26:36,067 INFO L226 Difference]: Without dead ends: 259 [2024-09-25 10:26:36,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 233 SyntacticMatches, 30 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2024-09-25 10:26:36,068 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:36,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 500 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-25 10:26:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-25 10:26:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:36,294 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:36,294 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:36,294 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:36,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:36,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:36,295 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:36,308 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2024-09-25 10:26:36,495 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,130 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:36,496 INFO L399 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:36,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1632688363, now seen corresponding path program 89 times [2024-09-25 10:26:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126228322] [2024-09-25 10:26:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126228322] [2024-09-25 10:26:36,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126228322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721726073] [2024-09-25 10:26:36,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:26:36,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:36,938 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:36,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-09-25 10:26:36,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-25 10:26:36,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:37,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:37,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:37,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721726073] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:37,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:37,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2024-09-25 10:26:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386323714] [2024-09-25 10:26:37,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:37,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-25 10:26:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-25 10:26:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:26:37,979 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:39,082 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-25 10:26:39,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:39,084 INFO L225 Difference]: With dead ends: 305 [2024-09-25 10:26:39,084 INFO L226 Difference]: Without dead ends: 252 [2024-09-25 10:26:39,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 30 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=613, Invalid=2809, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:26:39,085 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:39,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 368 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-25 10:26:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-25 10:26:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:39,312 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:39,312 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:39,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:39,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:39,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:39,312 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:39,324 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:39,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:39,513 INFO L399 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:39,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -358975754, now seen corresponding path program 90 times [2024-09-25 10:26:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069073229] [2024-09-25 10:26:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069073229] [2024-09-25 10:26:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069073229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569356837] [2024-09-25 10:26:39,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:26:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:39,972 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:39,973 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-09-25 10:26:40,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-25 10:26:40,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:40,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:40,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:40,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569356837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:41,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2024-09-25 10:26:41,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590700916] [2024-09-25 10:26:41,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:41,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-25 10:26:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-25 10:26:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:26:41,016 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:41,961 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-25 10:26:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:41,963 INFO L225 Difference]: With dead ends: 296 [2024-09-25 10:26:41,963 INFO L226 Difference]: Without dead ends: 243 [2024-09-25 10:26:41,963 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 235 SyntacticMatches, 30 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 10:26:41,964 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:41,964 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-25 10:26:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-25 10:26:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:42,198 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:42,198 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:42,198 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:42,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:42,199 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:42,199 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:42,211 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2024-09-25 10:26:42,399 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:42,399 INFO L399 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:42,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -872077579, now seen corresponding path program 91 times [2024-09-25 10:26:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840413274] [2024-09-25 10:26:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:42,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840413274] [2024-09-25 10:26:42,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840413274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:42,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947623175] [2024-09-25 10:26:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:26:42,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:42,850 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:42,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-09-25 10:26:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:42,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:42,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:43,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947623175] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:43,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2024-09-25 10:26:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817330181] [2024-09-25 10:26:43,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:43,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:26:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:26:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:26:43,888 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:44,837 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-25 10:26:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:44,839 INFO L225 Difference]: With dead ends: 285 [2024-09-25 10:26:44,839 INFO L226 Difference]: Without dead ends: 232 [2024-09-25 10:26:44,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 236 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=613, Invalid=2579, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:26:44,840 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:44,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-25 10:26:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-25 10:26:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-25 10:26:45,080 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-25 10:26:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:45,080 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-25 10:26:45,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:45,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-25 10:26:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:26:45,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:45,081 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:45,094 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:45,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:45,282 INFO L399 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:45,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash -57345258, now seen corresponding path program 14 times [2024-09-25 10:26:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:45,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491854768] [2024-09-25 10:26:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:26:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:26:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:26:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:26:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:26:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:26:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:26:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:26:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:26:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:26:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:26:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:26:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:26:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:26:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491854768] [2024-09-25 10:26:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491854768] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264067978] [2024-09-25 10:26:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:45,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:45,748 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:45,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-09-25 10:26:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:45,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 10:26:45,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:46,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:46,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264067978] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:46,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:46,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2024-09-25 10:26:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726167526] [2024-09-25 10:26:46,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:46,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-25 10:26:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-25 10:26:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 10:26:46,774 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:47,539 INFO L93 Difference]: Finished difference Result 275 states and 323 transitions. [2024-09-25 10:26:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-25 10:26:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-25 10:26:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:47,542 INFO L225 Difference]: With dead ends: 275 [2024-09-25 10:26:47,542 INFO L226 Difference]: Without dead ends: 222 [2024-09-25 10:26:47,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 30 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=2461, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:26:47,542 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:47,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 567 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-25 10:26:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 162. [2024-09-25 10:26:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.140625) internal successors, (146), 129 states have internal predecessors, (146), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:26:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 179 transitions. [2024-09-25 10:26:47,764 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 179 transitions. Word has length 128 [2024-09-25 10:26:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:47,764 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 179 transitions. [2024-09-25 10:26:47,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 10:26:47,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 179 transitions. [2024-09-25 10:26:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-25 10:26:47,765 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:47,765 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:47,779 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:47,965 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-09-25 10:26:47,965 INFO L399 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:47,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1636582049, now seen corresponding path program 28 times [2024-09-25 10:26:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80379621] [2024-09-25 10:26:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:26:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:26:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:26:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:26:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:26:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:26:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 133 proven. 316 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80379621] [2024-09-25 10:26:48,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80379621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5547641] [2024-09-25 10:26:48,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:26:48,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:48,238 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:48,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-09-25 10:26:48,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:26:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:48,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-25 10:26:48,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:48,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:26:48,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5547641] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:48,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:48,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2024-09-25 10:26:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288462578] [2024-09-25 10:26:48,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:48,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:26:48,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:26:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:26:48,658 INFO L87 Difference]: Start difference. First operand 162 states and 179 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:26:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:49,054 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2024-09-25 10:26:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:26:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 129 [2024-09-25 10:26:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:49,056 INFO L225 Difference]: With dead ends: 175 [2024-09-25 10:26:49,057 INFO L226 Difference]: Without dead ends: 173 [2024-09-25 10:26:49,057 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 268 SyntacticMatches, 32 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:26:49,057 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:49,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 344 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:26:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-25 10:26:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2024-09-25 10:26:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 134 states have internal predecessors, (151), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:26:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2024-09-25 10:26:49,300 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 129 [2024-09-25 10:26:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:49,300 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2024-09-25 10:26:49,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:26:49,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2024-09-25 10:26:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:26:49,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:49,301 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:49,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2024-09-25 10:26:49,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-09-25 10:26:49,502 INFO L399 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:49,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:49,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1540394903, now seen corresponding path program 29 times [2024-09-25 10:26:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011788300] [2024-09-25 10:26:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:26:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:26:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:26:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:26:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:26:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:26:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:26:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011788300] [2024-09-25 10:26:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011788300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832964037] [2024-09-25 10:26:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:26:50,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:50,031 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:50,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-09-25 10:26:50,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-25 10:26:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:50,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:26:50,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:50,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:51,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832964037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:51,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2024-09-25 10:26:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403946004] [2024-09-25 10:26:51,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:51,438 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-25 10:26:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-25 10:26:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2024-09-25 10:26:51,439 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:52,240 INFO L93 Difference]: Finished difference Result 289 states and 339 transitions. [2024-09-25 10:26:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:26:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:26:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:52,242 INFO L225 Difference]: With dead ends: 289 [2024-09-25 10:26:52,242 INFO L226 Difference]: Without dead ends: 233 [2024-09-25 10:26:52,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 237 SyntacticMatches, 32 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4364 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1005, Invalid=4397, Unknown=0, NotChecked=0, Total=5402 [2024-09-25 10:26:52,243 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:52,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 390 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-25 10:26:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2024-09-25 10:26:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:26:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:26:52,515 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:26:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:52,515 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:26:52,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:52,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:26:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:26:52,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:52,516 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:52,528 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-09-25 10:26:52,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-09-25 10:26:52,717 INFO L399 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:52,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2140517866, now seen corresponding path program 92 times [2024-09-25 10:26:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621249922] [2024-09-25 10:26:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:26:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:26:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:26:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:26:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:26:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:26:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:26:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 332 proven. 149 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621249922] [2024-09-25 10:26:53,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621249922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326695528] [2024-09-25 10:26:53,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:26:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:53,249 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:53,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-09-25 10:26:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:26:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:53,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:26:53,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:54,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 375 proven. 106 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326695528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:54,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2024-09-25 10:26:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439399763] [2024-09-25 10:26:54,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:54,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-25 10:26:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-25 10:26:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2024-09-25 10:26:54,649 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:55,598 INFO L93 Difference]: Finished difference Result 303 states and 353 transitions. [2024-09-25 10:26:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:26:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:26:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:55,600 INFO L225 Difference]: With dead ends: 303 [2024-09-25 10:26:55,600 INFO L226 Difference]: Without dead ends: 247 [2024-09-25 10:26:55,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 238 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=956, Invalid=4300, Unknown=0, NotChecked=0, Total=5256 [2024-09-25 10:26:55,601 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:55,601 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:26:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-25 10:26:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 170. [2024-09-25 10:26:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:26:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:26:55,890 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:26:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:55,890 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:26:55,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.625) internal successors, (117), 72 states have internal predecessors, (117), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:55,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:26:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:26:55,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:55,891 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:55,903 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2024-09-25 10:26:56,091 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-09-25 10:26:56,091 INFO L399 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:56,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 511689655, now seen corresponding path program 93 times [2024-09-25 10:26:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:56,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436972181] [2024-09-25 10:26:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:26:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:26:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:26:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:26:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:26:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:26:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:26:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 332 proven. 137 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:56,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436972181] [2024-09-25 10:26:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436972181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547448962] [2024-09-25 10:26:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:26:56,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:56,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:56,700 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:56,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-09-25 10:26:56,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-25 10:26:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:56,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:26:56,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:57,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 375 proven. 94 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:26:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547448962] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:26:58,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:26:58,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2024-09-25 10:26:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549811854] [2024-09-25 10:26:58,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:58,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-25 10:26:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-25 10:26:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2024-09-25 10:26:58,076 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:59,334 INFO L93 Difference]: Finished difference Result 315 states and 365 transitions. [2024-09-25 10:26:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:26:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:26:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:59,337 INFO L225 Difference]: With dead ends: 315 [2024-09-25 10:26:59,337 INFO L226 Difference]: Without dead ends: 259 [2024-09-25 10:26:59,337 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 239 SyntacticMatches, 32 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=911, Invalid=4201, Unknown=0, NotChecked=0, Total=5112 [2024-09-25 10:26:59,337 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:59,338 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 473 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:26:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-25 10:26:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 170. [2024-09-25 10:26:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:26:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:26:59,599 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:26:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:59,599 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:26:59,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 71 states have internal predecessors, (116), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:26:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:26:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:26:59,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:59,600 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:59,612 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2024-09-25 10:26:59,800 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:59,800 INFO L399 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:59,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1896607242, now seen corresponding path program 94 times [2024-09-25 10:26:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542403429] [2024-09-25 10:26:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:27:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:27:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:27:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:27:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:27:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:27:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:27:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:27:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:27:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:27:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:27:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:27:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:27:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:27:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:27:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 332 proven. 127 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542403429] [2024-09-25 10:27:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542403429] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:00,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444253592] [2024-09-25 10:27:00,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:27:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:00,306 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-09-25 10:27:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:27:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:00,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:00,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:01,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 375 proven. 84 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:01,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444253592] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:01,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:01,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2024-09-25 10:27:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553249250] [2024-09-25 10:27:01,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:01,617 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-09-25 10:27:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:01,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-09-25 10:27:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:27:01,618 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:02,918 INFO L93 Difference]: Finished difference Result 325 states and 375 transitions. [2024-09-25 10:27:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:27:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:27:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:02,920 INFO L225 Difference]: With dead ends: 325 [2024-09-25 10:27:02,920 INFO L226 Difference]: Without dead ends: 269 [2024-09-25 10:27:02,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 240 SyntacticMatches, 32 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3895 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=4100, Unknown=0, NotChecked=0, Total=4970 [2024-09-25 10:27:02,921 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:02,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 492 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-25 10:27:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 170. [2024-09-25 10:27:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:27:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:27:03,183 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:27:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:03,183 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:27:03,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 70 states have internal predecessors, (115), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:03,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:27:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:27:03,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:03,184 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:03,196 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2024-09-25 10:27:03,384 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-09-25 10:27:03,384 INFO L399 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:03,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -173178921, now seen corresponding path program 95 times [2024-09-25 10:27:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035949547] [2024-09-25 10:27:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:27:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:27:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:27:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:27:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:27:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:27:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:27:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:27:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:27:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:27:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:27:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:27:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:27:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:27:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:27:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 332 proven. 119 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:03,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:03,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035949547] [2024-09-25 10:27:03,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035949547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:03,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382040473] [2024-09-25 10:27:03,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:03,878 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:03,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-09-25 10:27:03,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-25 10:27:03,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:03,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:03,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:04,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 76 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382040473] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:05,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:05,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2024-09-25 10:27:05,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62857770] [2024-09-25 10:27:05,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:05,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-25 10:27:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-25 10:27:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:27:05,181 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:06,717 INFO L93 Difference]: Finished difference Result 333 states and 383 transitions. [2024-09-25 10:27:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:27:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:27:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:06,720 INFO L225 Difference]: With dead ends: 333 [2024-09-25 10:27:06,720 INFO L226 Difference]: Without dead ends: 277 [2024-09-25 10:27:06,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 241 SyntacticMatches, 32 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=833, Invalid=3997, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 10:27:06,720 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:06,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:27:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-25 10:27:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 170. [2024-09-25 10:27:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:27:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:27:07,009 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:27:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:07,010 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:27:07,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:07,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:27:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:27:07,010 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:07,010 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:07,023 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2024-09-25 10:27:07,211 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,140 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,211 INFO L399 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:07,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash 990794198, now seen corresponding path program 96 times [2024-09-25 10:27:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824824706] [2024-09-25 10:27:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:27:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:27:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:27:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:27:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:27:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:27:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:27:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:27:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:27:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:27:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:27:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:27:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:27:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:27:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:27:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 332 proven. 113 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824824706] [2024-09-25 10:27:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824824706] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087673059] [2024-09-25 10:27:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:07,711 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:07,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-09-25 10:27:07,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-25 10:27:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:07,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:07,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:08,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 375 proven. 70 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087673059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:08,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:08,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2024-09-25 10:27:08,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984058179] [2024-09-25 10:27:08,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:08,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-25 10:27:08,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-25 10:27:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 10:27:08,987 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:10,559 INFO L93 Difference]: Finished difference Result 339 states and 389 transitions. [2024-09-25 10:27:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:27:10,559 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:27:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:10,561 INFO L225 Difference]: With dead ends: 339 [2024-09-25 10:27:10,562 INFO L226 Difference]: Without dead ends: 283 [2024-09-25 10:27:10,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 242 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3556 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=800, Invalid=3892, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:27:10,562 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:10,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-25 10:27:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 170. [2024-09-25 10:27:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:27:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:27:10,835 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:27:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:10,835 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:27:10,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:10,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:27:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:27:10,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:10,836 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:10,849 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2024-09-25 10:27:11,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:11,036 INFO L399 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2136720375, now seen corresponding path program 97 times [2024-09-25 10:27:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482500053] [2024-09-25 10:27:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:27:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:27:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:27:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:27:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:27:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:27:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:27:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:27:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:27:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:27:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:27:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:27:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:27:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:27:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:27:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 332 proven. 109 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:11,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482500053] [2024-09-25 10:27:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482500053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846140542] [2024-09-25 10:27:11,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:11,527 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:11,528 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-09-25 10:27:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:11,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:12,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 375 proven. 66 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846140542] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:12,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2024-09-25 10:27:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344529220] [2024-09-25 10:27:12,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:12,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-25 10:27:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-25 10:27:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 10:27:12,791 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:14,465 INFO L93 Difference]: Finished difference Result 343 states and 393 transitions. [2024-09-25 10:27:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:27:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 136 [2024-09-25 10:27:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:14,467 INFO L225 Difference]: With dead ends: 343 [2024-09-25 10:27:14,467 INFO L226 Difference]: Without dead ends: 287 [2024-09-25 10:27:14,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 243 SyntacticMatches, 32 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=3785, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 10:27:14,468 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:14,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 465 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:27:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-09-25 10:27:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 170. [2024-09-25 10:27:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 135 states have internal predecessors, (152), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:27:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2024-09-25 10:27:14,755 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 136 [2024-09-25 10:27:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:14,755 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2024-09-25 10:27:14,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:27:14,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2024-09-25 10:27:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-25 10:27:14,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:14,756 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:14,768 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2024-09-25 10:27:14,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:14,957 INFO L399 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:14,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 511117750, now seen corresponding path program 98 times [2024-09-25 10:27:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905694229] [2024-09-25 10:27:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:27:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:27:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:27:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:27:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:27:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:27:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:27:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:27:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:27:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:27:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:27:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-25 10:27:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:27:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-25 10:27:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-25 10:27:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 332 proven. 107 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:15,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905694229] [2024-09-25 10:27:15,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905694229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:15,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714337507] [2024-09-25 10:27:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:15,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:15,452 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-09-25 10:27:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:15,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:15,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:27:15,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:16,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 375 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:27:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714337507] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:16,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2024-09-25 10:27:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804163895] [2024-09-25 10:27:16,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:16,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-25 10:27:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-25 10:27:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2024-09-25 10:27:16,693 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand has 66 states, 66 states have (on average 1.6818181818181819) internal successors, (111), 66 states have internal predecessors, (111), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32)