./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:17:31,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:17:31,302 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:17:31,307 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:17:31,307 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:17:31,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:17:31,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:17:31,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:17:31,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:17:31,332 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:17:31,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:17:31,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:17:31,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:17:31,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:17:31,333 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:17:31,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:17:31,334 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:17:31,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:17:31,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:17:31,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:17:31,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:17:31,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:17:31,339 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:17:31,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:17:31,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:17:31,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:17:31,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:17:31,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:17:31,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:17:31,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:17:31,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:17:31,341 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:17:31,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:17:31,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:17:31,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:17:31,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:17:31,577 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:17:31,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-20 19:17:32,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:17:32,742 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) [2024-09-20 19:17:32,887 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:17:32,887 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-09-20 19:17:32,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/da23cc601/6e26acece37c4f4aab541e1a9dfde7d6/FLAG72e8b83e8 [2024-09-20 19:17:32,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/da23cc601/6e26acece37c4f4aab541e1a9dfde7d6 [2024-09-20 19:17:32,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:17:32,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:17:32,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:17:32,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:17:32,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:17:32,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:17:32" (1/1) ... [2024-09-20 19:17:32,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e07e1c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:32, skipping insertion in model container [2024-09-20 19:17:32,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:17:32" (1/1) ... [2024-09-20 19:17:32,928 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:17:33,043 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-09-20 19:17:33,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:17:33,069 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:17:33,077 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2024-09-20 19:17:33,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:17:33,094 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:17:33,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33 WrapperNode [2024-09-20 19:17:33,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:17:33,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:17:33,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:17:33,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:17:33,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,109 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:17:33,110 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:17:33,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:17:33,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:17:33,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:17:33,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,118 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,127 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 19:17:33,127 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,130 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:17:33,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:17:33,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:17:33,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:17:33,137 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (1/1) ... [2024-09-20 19:17:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:17:33,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:33,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 19:17:33,174 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 19:17:33,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:17:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:17:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:17:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:17:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:17:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:17:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:17:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:17:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:17:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:17:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:17:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:17:33,267 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:17:33,268 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:17:33,397 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 19:17:33,397 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:17:33,420 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:17:33,420 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 19:17:33,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:17:33 BoogieIcfgContainer [2024-09-20 19:17:33,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:17:33,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:17:33,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:17:33,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:17:33,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:17:32" (1/3) ... [2024-09-20 19:17:33,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446f1c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:17:33, skipping insertion in model container [2024-09-20 19:17:33,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:17:33" (2/3) ... [2024-09-20 19:17:33,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446f1c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:17:33, skipping insertion in model container [2024-09-20 19:17:33,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:17:33" (3/3) ... [2024-09-20 19:17:33,432 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-09-20 19:17:33,468 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:17:33,468 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:17:33,509 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:17:33,514 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;@12c04ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:17:33,514 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:17:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:17:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 19:17:33,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:33,526 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:33,526 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:33,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-20 19:17:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:33,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193974479] [2024-09-20 19:17:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193974479] [2024-09-20 19:17:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193974479] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:33,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:17:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944341001] [2024-09-20 19:17:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:33,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:17:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:17:33,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:17:33,718 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:17:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:33,748 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-20 19:17:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:17:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-20 19:17:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:33,757 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:17:33,757 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 19:17:33,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:17:33,762 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:33,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 19:17:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-20 19:17:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:17:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-20 19:17:33,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-20 19:17:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:33,788 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-20 19:17:33,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:17:33,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-20 19:17:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 19:17:33,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:33,793 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:33,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:17:33,794 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:33,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-20 19:17:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79081393] [2024-09-20 19:17:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:33,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:17:34,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:34,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79081393] [2024-09-20 19:17:34,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79081393] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:34,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:34,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 19:17:34,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914117368] [2024-09-20 19:17:34,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:34,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 19:17:34,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 19:17:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:34,070 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:17:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:34,156 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-20 19:17:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:17:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-20 19:17:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:34,158 INFO L225 Difference]: With dead ends: 53 [2024-09-20 19:17:34,159 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 19:17:34,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:34,161 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:34,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 19:17:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-20 19:17:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 19:17:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-20 19:17:34,175 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-20 19:17:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:34,175 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-20 19:17:34,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:17:34,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-20 19:17:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:17:34,177 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:34,177 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:34,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:17:34,178 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:34,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-20 19:17:34,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:34,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842698574] [2024-09-20 19:17:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:34,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:34,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642084558] [2024-09-20 19:17:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:34,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:34,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:34,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:34,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:17:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:17:34,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:34,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842698574] [2024-09-20 19:17:34,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642084558] [2024-09-20 19:17:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642084558] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:34,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622768962] [2024-09-20 19:17:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:34,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:34,368 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:17:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:34,418 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-20 19:17:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-20 19:17:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:34,419 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:17:34,419 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 19:17:34,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:34,420 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:34,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 19:17:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-20 19:17:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 19:17:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-20 19:17:34,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-20 19:17:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:34,439 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-20 19:17:34,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-20 19:17:34,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-20 19:17:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 19:17:34,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:34,441 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:34,453 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:17:34,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:34,642 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:34,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-20 19:17:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562239119] [2024-09-20 19:17:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:17:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562239119] [2024-09-20 19:17:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562239119] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749158763] [2024-09-20 19:17:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:34,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:34,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:34,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:17:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:34,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:17:34,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:17:34,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:17:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749158763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:34,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:17:34,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-20 19:17:34,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153070907] [2024-09-20 19:17:34,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:34,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 19:17:34,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 19:17:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:17:34,990 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:17:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:35,136 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-20 19:17:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:17:35,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-20 19:17:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:35,139 INFO L225 Difference]: With dead ends: 102 [2024-09-20 19:17:35,139 INFO L226 Difference]: Without dead ends: 95 [2024-09-20 19:17:35,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:17:35,141 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:35,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-20 19:17:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-20 19:17:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:17:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-20 19:17:35,156 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-20 19:17:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:35,156 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-20 19:17:35,157 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 19:17:35,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-20 19:17:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 19:17:35,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:35,158 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:35,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:17:35,361 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:35,362 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:35,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-20 19:17:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761991478] [2024-09-20 19:17:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259132058] [2024-09-20 19:17:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:35,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:35,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:17:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:35,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 19:17:35,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:35,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761991478] [2024-09-20 19:17:35,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:35,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259132058] [2024-09-20 19:17:35,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259132058] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:35,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:35,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607392738] [2024-09-20 19:17:35,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:35,494 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:35,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:35,494 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:35,538 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-20 19:17:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:35,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-20 19:17:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:35,539 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:17:35,539 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 19:17:35,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:35,540 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:35,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 19:17:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-20 19:17:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-20 19:17:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-20 19:17:35,558 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-20 19:17:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:35,560 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-20 19:17:35,560 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:35,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-20 19:17:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 19:17:35,561 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:35,562 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:35,574 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:17:35,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:35,765 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:35,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:35,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-20 19:17:35,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:35,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925137389] [2024-09-20 19:17:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:35,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343277160] [2024-09-20 19:17:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:35,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:35,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:17:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:35,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:17:35,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:17:36,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:36,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925137389] [2024-09-20 19:17:36,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343277160] [2024-09-20 19:17:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343277160] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:36,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-20 19:17:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108238889] [2024-09-20 19:17:36,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:36,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:17:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:17:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:17:36,336 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:17:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:37,426 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-20 19:17:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:17:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-20 19:17:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:37,428 INFO L225 Difference]: With dead ends: 132 [2024-09-20 19:17:37,428 INFO L226 Difference]: Without dead ends: 130 [2024-09-20 19:17:37,428 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-20 19:17:37,428 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:37,429 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:17:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-20 19:17:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-20 19:17:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 19:17:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-20 19:17:37,477 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-20 19:17:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:37,479 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-20 19:17:37,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:17:37,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-20 19:17:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:17:37,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:37,480 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:37,498 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:17:37,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:37,681 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:37,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-20 19:17:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141497142] [2024-09-20 19:17:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:37,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719402982] [2024-09-20 19:17:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:37,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:17:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:37,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:17:37,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:17:37,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141497142] [2024-09-20 19:17:37,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719402982] [2024-09-20 19:17:37,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719402982] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:37,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:37,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974233929] [2024-09-20 19:17:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:37,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:37,768 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:17:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:37,835 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-20 19:17:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-20 19:17:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:37,838 INFO L225 Difference]: With dead ends: 155 [2024-09-20 19:17:37,838 INFO L226 Difference]: Without dead ends: 153 [2024-09-20 19:17:37,838 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:37,840 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:37,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-20 19:17:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-20 19:17:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-20 19:17:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-20 19:17:37,880 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-20 19:17:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:37,881 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-20 19:17:37,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:17:37,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-20 19:17:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:17:37,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:37,882 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:37,899 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 19:17:38,082 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:17:38,083 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-20 19:17:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179368397] [2024-09-20 19:17:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:38,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670631834] [2024-09-20 19:17:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:38,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:38,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:38,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:17:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:38,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 19:17:38,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:38,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:38,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179368397] [2024-09-20 19:17:38,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:38,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670631834] [2024-09-20 19:17:38,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670631834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:38,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:38,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-20 19:17:38,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324239731] [2024-09-20 19:17:38,259 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:38,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:17:38,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:38,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:17:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:17:38,260 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:38,405 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-20 19:17:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:17:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-20 19:17:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:38,408 INFO L225 Difference]: With dead ends: 174 [2024-09-20 19:17:38,409 INFO L226 Difference]: Without dead ends: 172 [2024-09-20 19:17:38,409 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:17:38,410 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:38,410 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:17:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-20 19:17:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-20 19:17:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-20 19:17:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-20 19:17:38,452 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-20 19:17:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:38,453 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-20 19:17:38,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:38,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-20 19:17:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 19:17:38,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:38,456 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:38,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:17:38,660 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:38,661 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:38,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-20 19:17:38,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:38,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682682384] [2024-09-20 19:17:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:38,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964654428] [2024-09-20 19:17:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:38,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:38,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:17:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:38,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 19:17:38,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:17:38,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:17:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682682384] [2024-09-20 19:17:38,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964654428] [2024-09-20 19:17:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964654428] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:38,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508869016] [2024-09-20 19:17:38,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:38,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:38,754 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:17:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:38,853 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-20 19:17:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:38,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-20 19:17:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:38,856 INFO L225 Difference]: With dead ends: 254 [2024-09-20 19:17:38,856 INFO L226 Difference]: Without dead ends: 252 [2024-09-20 19:17:38,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:38,858 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:38,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-20 19:17:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-20 19:17:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 19:17:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-20 19:17:38,909 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-20 19:17:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:38,909 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-20 19:17:38,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 19:17:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-20 19:17:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-20 19:17:38,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:38,910 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:38,922 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:17:39,114 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:39,117 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:39,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-20 19:17:39,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:39,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611423445] [2024-09-20 19:17:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:17:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:17:39,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:39,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611423445] [2024-09-20 19:17:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611423445] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:39,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:39,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945331475] [2024-09-20 19:17:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:39,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:39,188 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:39,265 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-20 19:17:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:17:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-20 19:17:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:39,268 INFO L225 Difference]: With dead ends: 291 [2024-09-20 19:17:39,268 INFO L226 Difference]: Without dead ends: 177 [2024-09-20 19:17:39,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:39,269 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:39,269 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-20 19:17:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-20 19:17:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-20 19:17:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-20 19:17:39,328 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-20 19:17:39,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:39,328 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-20 19:17:39,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:17:39,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-20 19:17:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 19:17:39,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:39,330 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:39,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 19:17:39,330 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-20 19:17:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303258430] [2024-09-20 19:17:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:39,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412038423] [2024-09-20 19:17:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:39,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:39,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:39,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:39,345 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:17:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:39,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:17:39,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 19:17:39,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 19:17:41,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303258430] [2024-09-20 19:17:41,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:41,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412038423] [2024-09-20 19:17:41,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412038423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:41,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:41,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 19:17:41,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107740878] [2024-09-20 19:17:41,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:41,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:17:41,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:17:41,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:17:41,273 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 19:17:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:45,111 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-20 19:17:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 19:17:45,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-20 19:17:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:45,113 INFO L225 Difference]: With dead ends: 393 [2024-09-20 19:17:45,113 INFO L226 Difference]: Without dead ends: 385 [2024-09-20 19:17:45,114 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 19:17:45,115 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:45,115 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 19:17:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-20 19:17:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-20 19:17:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-20 19:17:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-20 19:17:45,205 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-20 19:17:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:45,206 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-20 19:17:45,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-20 19:17:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-20 19:17:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 19:17:45,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:45,208 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:45,220 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:17:45,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:45,412 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:45,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:45,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-20 19:17:45,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:45,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035242633] [2024-09-20 19:17:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:17:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:17:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:17:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:17:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:17:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 19:17:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 19:17:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:17:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 19:17:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-20 19:17:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-20 19:17:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-20 19:17:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035242633] [2024-09-20 19:17:45,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035242633] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:17:45,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:17:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:17:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546872468] [2024-09-20 19:17:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:45,494 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:17:45,495 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 19:17:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:45,619 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-20 19:17:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-20 19:17:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:45,621 INFO L225 Difference]: With dead ends: 399 [2024-09-20 19:17:45,621 INFO L226 Difference]: Without dead ends: 243 [2024-09-20 19:17:45,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 19:17:45,622 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:45,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-20 19:17:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-20 19:17:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 19:17:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-20 19:17:45,698 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-20 19:17:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:45,698 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-20 19:17:45,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 19:17:45,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-20 19:17:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 19:17:45,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:45,699 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:45,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-20 19:17:45,699 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:45,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-20 19:17:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710714595] [2024-09-20 19:17:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942730806] [2024-09-20 19:17:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:45,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:45,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:45,716 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:45,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:17:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:45,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 19:17:45,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-20 19:17:45,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-20 19:17:45,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710714595] [2024-09-20 19:17:45,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942730806] [2024-09-20 19:17:45,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942730806] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:17:45,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:17:45,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 19:17:45,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364645029] [2024-09-20 19:17:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:17:45,852 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:17:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:17:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:17:45,852 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:17:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:45,960 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-20 19:17:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:17:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-20 19:17:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:45,962 INFO L225 Difference]: With dead ends: 234 [2024-09-20 19:17:45,962 INFO L226 Difference]: Without dead ends: 232 [2024-09-20 19:17:45,962 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:17:45,962 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:45,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:17:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-20 19:17:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-20 19:17:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-20 19:17:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-20 19:17:46,047 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-20 19:17:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:46,047 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-20 19:17:46,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-20 19:17:46,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-20 19:17:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 19:17:46,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:46,048 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:46,059 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:17:46,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 19:17:46,249 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:46,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-20 19:17:46,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:46,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903220304] [2024-09-20 19:17:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:46,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004375709] [2024-09-20 19:17:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:46,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:46,261 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:17:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:46,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 19:17:46,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 19:17:46,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 19:17:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903220304] [2024-09-20 19:17:47,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:47,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004375709] [2024-09-20 19:17:47,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004375709] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:47,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:47,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-20 19:17:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562437958] [2024-09-20 19:17:47,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:47,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:17:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:17:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:17:47,399 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:17:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:52,040 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-09-20 19:17:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 19:17:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-20 19:17:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:52,042 INFO L225 Difference]: With dead ends: 350 [2024-09-20 19:17:52,042 INFO L226 Difference]: Without dead ends: 348 [2024-09-20 19:17:52,042 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 19:17:52,043 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:52,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 444 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-20 19:17:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-20 19:17:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-09-20 19:17:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-09-20 19:17:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-09-20 19:17:52,187 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-09-20 19:17:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:52,187 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-09-20 19:17:52,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:17:52,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-09-20 19:17:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 19:17:52,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:52,188 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:17:52,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 19:17:52,389 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:52,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-20 19:17:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776196261] [2024-09-20 19:17:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733337001] [2024-09-20 19:17:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:17:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:52,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:52,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:17:52,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:17:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:17:52,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 19:17:52,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-20 19:17:52,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-20 19:17:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776196261] [2024-09-20 19:17:52,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:52,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733337001] [2024-09-20 19:17:52,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733337001] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:52,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:52,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-20 19:17:52,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560914745] [2024-09-20 19:17:52,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:52,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:17:52,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:52,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:17:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:17:52,668 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 19:17:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:17:53,443 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-09-20 19:17:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:17:53,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-20 19:17:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:17:53,448 INFO L225 Difference]: With dead ends: 426 [2024-09-20 19:17:53,448 INFO L226 Difference]: Without dead ends: 424 [2024-09-20 19:17:53,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:17:53,448 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:17:53,449 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:17:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-09-20 19:17:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-09-20 19:17:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-09-20 19:17:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-09-20 19:17:53,642 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-09-20 19:17:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:17:53,643 INFO L474 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-09-20 19:17:53,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 19:17:53,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-09-20 19:17:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 19:17:53,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:17:53,645 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:17:53,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 19:17:53,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 19:17:53,847 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:17:53,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:17:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-20 19:17:53,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:17:53,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124743424] [2024-09-20 19:17:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:17:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:17:53,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915231858] [2024-09-20 19:17:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:17:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:17:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:17:53,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:17:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:17:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:17:53,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 19:17:53,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:17:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-20 19:17:54,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:17:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 19:17:56,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:17:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124743424] [2024-09-20 19:17:56,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:17:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915231858] [2024-09-20 19:17:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915231858] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:17:56,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:17:56,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-20 19:17:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606461008] [2024-09-20 19:17:56,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:17:56,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:17:56,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:17:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:17:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:17:57,001 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 19:18:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:18:03,011 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-09-20 19:18:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 19:18:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-20 19:18:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:18:03,014 INFO L225 Difference]: With dead ends: 544 [2024-09-20 19:18:03,014 INFO L226 Difference]: Without dead ends: 540 [2024-09-20 19:18:03,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 19:18:03,015 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:18:03,015 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 683 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-20 19:18:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-20 19:18:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-09-20 19:18:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-20 19:18:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-09-20 19:18:03,333 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-09-20 19:18:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:18:03,334 INFO L474 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-09-20 19:18:03,334 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-20 19:18:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-09-20 19:18:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 19:18:03,335 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:18:03,335 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:18:03,347 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 19:18:03,535 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 19:18:03,536 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:18:03,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-20 19:18:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:18:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640476998] [2024-09-20 19:18:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:18:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:18:03,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398499840] [2024-09-20 19:18:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:03,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:18:03,549 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:18:03,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:18:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:03,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:18:03,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:18:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-20 19:18:03,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:18:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-20 19:18:04,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:04,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640476998] [2024-09-20 19:18:04,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:18:04,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398499840] [2024-09-20 19:18:04,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398499840] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:04,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:18:04,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-20 19:18:04,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989045856] [2024-09-20 19:18:04,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:04,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:18:04,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:18:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:18:04,061 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 19:18:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:18:05,816 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-09-20 19:18:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:18:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-20 19:18:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:18:05,821 INFO L225 Difference]: With dead ends: 1227 [2024-09-20 19:18:05,821 INFO L226 Difference]: Without dead ends: 1225 [2024-09-20 19:18:05,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 19:18:05,822 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 141 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:18:05,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:18:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-09-20 19:18:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-09-20 19:18:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 19:18:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-09-20 19:18:06,730 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-09-20 19:18:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:18:06,730 INFO L474 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-09-20 19:18:06,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-20 19:18:06,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-09-20 19:18:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-20 19:18:06,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:18:06,734 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:18:06,747 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 19:18:06,934 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 19:18:06,934 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:18:06,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-20 19:18:06,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:18:06,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463174036] [2024-09-20 19:18:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:18:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:18:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245880874] [2024-09-20 19:18:06,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:18:06,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:18:06,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:18:06,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:18:07,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:18:07,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:18:07,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 19:18:07,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:18:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 19:18:07,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:18:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-20 19:18:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463174036] [2024-09-20 19:18:07,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:18:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245880874] [2024-09-20 19:18:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245880874] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:07,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:18:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-20 19:18:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63393704] [2024-09-20 19:18:07,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:07,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:18:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:18:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:18:07,605 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 19:18:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:18:09,847 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-09-20 19:18:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:18:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-20 19:18:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:18:09,854 INFO L225 Difference]: With dead ends: 1373 [2024-09-20 19:18:09,854 INFO L226 Difference]: Without dead ends: 1369 [2024-09-20 19:18:09,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:18:09,855 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:18:09,855 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 19:18:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-09-20 19:18:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-09-20 19:18:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 19:18:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-09-20 19:18:10,913 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-09-20 19:18:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:18:10,913 INFO L474 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-09-20 19:18:10,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-20 19:18:10,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-09-20 19:18:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-20 19:18:10,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:18:10,915 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:18:10,921 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:18:11,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 19:18:11,115 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:18:11,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-20 19:18:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:18:11,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699874974] [2024-09-20 19:18:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:11,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:18:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:18:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:18:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:18:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:18:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:18:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 19:18:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:18:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 19:18:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 19:18:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 19:18:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 19:18:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 19:18:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 19:18:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:18:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 19:18:11,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:11,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699874974] [2024-09-20 19:18:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699874974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:18:11,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798767959] [2024-09-20 19:18:11,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:18:11,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:11,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:18:11,253 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:18:11,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:18:11,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:18:11,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:18:11,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:18:11,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:18:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 19:18:11,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:18:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-20 19:18:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798767959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:11,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:18:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-20 19:18:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773564240] [2024-09-20 19:18:11,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:11,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:18:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:18:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:18:11,434 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 19:18:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:18:12,898 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-09-20 19:18:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 19:18:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-20 19:18:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:18:12,905 INFO L225 Difference]: With dead ends: 1291 [2024-09-20 19:18:12,905 INFO L226 Difference]: Without dead ends: 1286 [2024-09-20 19:18:12,905 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:18:12,906 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:18:12,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:18:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-20 19:18:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-09-20 19:18:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-09-20 19:18:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-09-20 19:18:13,996 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-09-20 19:18:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:18:13,996 INFO L474 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-09-20 19:18:13,996 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 19:18:13,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-09-20 19:18:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-20 19:18:13,997 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:18:13,998 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:18:14,003 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 19:18:14,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:14,198 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:18:14,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-20 19:18:14,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:18:14,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210321074] [2024-09-20 19:18:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:14,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:18:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:18:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008710419] [2024-09-20 19:18:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:18:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:18:14,213 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:18:14,215 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:18:14,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:18:14,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:18:14,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-20 19:18:14,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:18:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 19:18:15,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:18:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 19:18:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210321074] [2024-09-20 19:18:19,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:18:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008710419] [2024-09-20 19:18:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008710419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:19,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:18:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2024-09-20 19:18:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246407647] [2024-09-20 19:18:19,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:19,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 19:18:19,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 19:18:19,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:18:19,103 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 19:18:30,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:18:35,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:18:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:18:51,556 INFO L93 Difference]: Finished difference Result 1643 states and 2666 transitions. [2024-09-20 19:18:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-09-20 19:18:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 112 [2024-09-20 19:18:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:18:51,562 INFO L225 Difference]: With dead ends: 1643 [2024-09-20 19:18:51,562 INFO L226 Difference]: Without dead ends: 1244 [2024-09-20 19:18:51,565 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1625, Invalid=8077, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 19:18:51,566 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 298 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:18:51,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 978 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1351 Invalid, 1 Unknown, 0 Unchecked, 12.4s Time] [2024-09-20 19:18:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-09-20 19:18:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1002. [2024-09-20 19:18:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 495 states have (on average 1.298989898989899) internal successors, (643), 495 states have internal predecessors, (643), 479 states have call successors, (479), 29 states have call predecessors, (479), 27 states have return successors, (477), 477 states have call predecessors, (477), 477 states have call successors, (477) [2024-09-20 19:18:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1599 transitions. [2024-09-20 19:18:52,769 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1599 transitions. Word has length 112 [2024-09-20 19:18:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:18:52,769 INFO L474 AbstractCegarLoop]: Abstraction has 1002 states and 1599 transitions. [2024-09-20 19:18:52,769 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-20 19:18:52,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1599 transitions. [2024-09-20 19:18:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 19:18:52,771 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:18:52,771 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:18:52,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 19:18:52,971 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:52,971 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:18:52,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:18:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-20 19:18:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:18:52,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169236518] [2024-09-20 19:18:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:18:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:18:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:18:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295172608] [2024-09-20 19:18:52,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:18:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:18:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:18:52,998 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:18:52,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 19:18:53,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 19:18:53,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:18:53,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 19:18:53,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:18:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 19:18:53,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:18:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-20 19:18:56,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:18:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169236518] [2024-09-20 19:18:56,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:18:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295172608] [2024-09-20 19:18:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295172608] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:18:56,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:18:56,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-20 19:18:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581781106] [2024-09-20 19:18:56,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:18:56,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 19:18:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:18:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 19:18:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-20 19:18:56,300 INFO L87 Difference]: Start difference. First operand 1002 states and 1599 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 19:19:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:19:10,526 INFO L93 Difference]: Finished difference Result 1406 states and 2243 transitions. [2024-09-20 19:19:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-20 19:19:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-20 19:19:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:19:10,532 INFO L225 Difference]: With dead ends: 1406 [2024-09-20 19:19:10,532 INFO L226 Difference]: Without dead ends: 1400 [2024-09-20 19:19:10,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1592, Invalid=7914, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 19:19:10,535 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 321 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:19:10,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 850 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-20 19:19:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-09-20 19:19:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1181. [2024-09-20 19:19:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 588 states have (on average 1.2976190476190477) internal successors, (763), 588 states have internal predecessors, (763), 563 states have call successors, (563), 31 states have call predecessors, (563), 29 states have return successors, (561), 561 states have call predecessors, (561), 561 states have call successors, (561) [2024-09-20 19:19:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1887 transitions. [2024-09-20 19:19:12,223 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1887 transitions. Word has length 115 [2024-09-20 19:19:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:19:12,223 INFO L474 AbstractCegarLoop]: Abstraction has 1181 states and 1887 transitions. [2024-09-20 19:19:12,224 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-20 19:19:12,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1887 transitions. [2024-09-20 19:19:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 19:19:12,225 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:19:12,225 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:19:12,237 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-20 19:19:12,425 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:19:12,426 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:19:12,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-20 19:19:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:19:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258099446] [2024-09-20 19:19:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:19:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:19:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:19:12,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464704267] [2024-09-20 19:19:12,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:19:12,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:19:12,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:19:12,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:19:12,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 19:19:12,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:19:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:19:12,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-20 19:19:12,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:19:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 19:19:13,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:19:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:19:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258099446] [2024-09-20 19:19:18,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:19:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464704267] [2024-09-20 19:19:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464704267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:19:18,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:19:18,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 19:19:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97693258] [2024-09-20 19:19:18,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:19:18,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:19:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:19:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:19:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:19:18,966 INFO L87 Difference]: Start difference. First operand 1181 states and 1887 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:19:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:19:22,149 INFO L93 Difference]: Finished difference Result 1325 states and 2100 transitions. [2024-09-20 19:19:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 19:19:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-20 19:19:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:19:22,155 INFO L225 Difference]: With dead ends: 1325 [2024-09-20 19:19:22,155 INFO L226 Difference]: Without dead ends: 1320 [2024-09-20 19:19:22,156 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 19:19:22,156 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:19:22,156 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 541 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:19:22,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-09-20 19:19:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1295. [2024-09-20 19:19:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 642 states have (on average 1.2990654205607477) internal successors, (834), 642 states have internal predecessors, (834), 619 states have call successors, (619), 35 states have call predecessors, (619), 33 states have return successors, (617), 617 states have call predecessors, (617), 617 states have call successors, (617) [2024-09-20 19:19:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2070 transitions. [2024-09-20 19:19:24,001 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2070 transitions. Word has length 115 [2024-09-20 19:19:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:19:24,001 INFO L474 AbstractCegarLoop]: Abstraction has 1295 states and 2070 transitions. [2024-09-20 19:19:24,001 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:19:24,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2070 transitions. [2024-09-20 19:19:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-20 19:19:24,003 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:19:24,003 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:19:24,015 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 19:19:24,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 19:19:24,207 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:19:24,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-20 19:19:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:19:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134053346] [2024-09-20 19:19:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:19:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:19:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:19:24,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620875122] [2024-09-20 19:19:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:19:24,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:19:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:19:24,222 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:19:24,224 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 19:19:24,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 19:19:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:19:24,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-20 19:19:24,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:19:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-09-20 19:19:25,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:19:29,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:19:29,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134053346] [2024-09-20 19:19:29,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:19:29,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620875122] [2024-09-20 19:19:29,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620875122] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:19:29,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:19:29,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 19:19:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802892133] [2024-09-20 19:19:29,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:19:29,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:19:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:19:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:19:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:19:29,179 INFO L87 Difference]: Start difference. First operand 1295 states and 2070 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:19:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:19:33,209 INFO L93 Difference]: Finished difference Result 1521 states and 2421 transitions. [2024-09-20 19:19:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:19:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 120 [2024-09-20 19:19:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:19:33,216 INFO L225 Difference]: With dead ends: 1521 [2024-09-20 19:19:33,216 INFO L226 Difference]: Without dead ends: 1516 [2024-09-20 19:19:33,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:19:33,217 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:19:33,217 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 951 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 19:19:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2024-09-20 19:19:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1386. [2024-09-20 19:19:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 685 states have (on average 1.2992700729927007) internal successors, (890), 685 states have internal predecessors, (890), 663 states have call successors, (663), 39 states have call predecessors, (663), 37 states have return successors, (661), 661 states have call predecessors, (661), 661 states have call successors, (661) [2024-09-20 19:19:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2214 transitions. [2024-09-20 19:19:35,267 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2214 transitions. Word has length 120 [2024-09-20 19:19:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:19:35,268 INFO L474 AbstractCegarLoop]: Abstraction has 1386 states and 2214 transitions. [2024-09-20 19:19:35,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-20 19:19:35,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2214 transitions. [2024-09-20 19:19:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-20 19:19:35,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:19:35,270 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:19:35,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 19:19:35,470 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 19:19:35,470 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:19:35,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-20 19:19:35,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:19:35,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761735671] [2024-09-20 19:19:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:19:35,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:19:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:19:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706398814] [2024-09-20 19:19:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:19:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:19:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:19:35,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:19:35,494 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 19:19:35,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 19:19:35,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:19:35,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 19:19:35,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:19:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:19:36,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:19:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:19:39,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:19:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761735671] [2024-09-20 19:19:39,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:19:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706398814] [2024-09-20 19:19:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706398814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:19:39,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:19:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-09-20 19:19:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141003758] [2024-09-20 19:19:39,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:19:39,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 19:19:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:19:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 19:19:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:19:39,648 INFO L87 Difference]: Start difference. First operand 1386 states and 2214 transitions. Second operand has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 19:19:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:19:51,495 INFO L93 Difference]: Finished difference Result 2389 states and 3902 transitions. [2024-09-20 19:19:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 19:19:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 132 [2024-09-20 19:19:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:19:51,506 INFO L225 Difference]: With dead ends: 2389 [2024-09-20 19:19:51,506 INFO L226 Difference]: Without dead ends: 2383 [2024-09-20 19:19:51,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1501, Invalid=9419, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 19:19:51,508 INFO L434 NwaCegarLoop]: 82 mSDtfsCounter, 238 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:19:51,508 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1302 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 19:19:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2024-09-20 19:19:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1680. [2024-09-20 19:19:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 822 states have (on average 1.3065693430656935) internal successors, (1074), 822 states have internal predecessors, (1074), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-20 19:19:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2710 transitions. [2024-09-20 19:19:54,241 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2710 transitions. Word has length 132 [2024-09-20 19:19:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:19:54,241 INFO L474 AbstractCegarLoop]: Abstraction has 1680 states and 2710 transitions. [2024-09-20 19:19:54,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 19:19:54,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2710 transitions. [2024-09-20 19:19:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-20 19:19:54,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:19:54,244 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:19:54,250 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 19:19:54,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 19:19:54,444 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:19:54,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:19:54,445 INFO L85 PathProgramCache]: Analyzing trace with hash 125055237, now seen corresponding path program 7 times [2024-09-20 19:19:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:19:54,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083594453] [2024-09-20 19:19:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:19:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:19:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:19:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:19:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:19:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 19:19:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 19:19:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 19:19:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 19:19:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 19:19:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 19:19:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 19:19:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 19:19:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 19:19:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 19:19:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 19:19:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 19:19:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 19:19:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 19:19:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 19:19:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 19:19:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-20 19:19:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-20 19:19:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-20 19:19:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:19:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083594453] [2024-09-20 19:19:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083594453] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:19:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807481849] [2024-09-20 19:19:54,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:19:54,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:19:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:19:54,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:19:54,586 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 19:19:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:19:54,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 19:19:54,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:19:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 250 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-20 19:19:54,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:19:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-09-20 19:19:54,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807481849] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:19:54,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:19:54,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-09-20 19:19:54,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005140100] [2024-09-20 19:19:54,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:19:54,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:19:54,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:19:54,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:19:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:19:54,771 INFO L87 Difference]: Start difference. First operand 1680 states and 2710 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-20 19:19:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:19:57,992 INFO L93 Difference]: Finished difference Result 2843 states and 4592 transitions. [2024-09-20 19:19:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:19:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 137 [2024-09-20 19:19:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:19:58,001 INFO L225 Difference]: With dead ends: 2843 [2024-09-20 19:19:58,001 INFO L226 Difference]: Without dead ends: 1920 [2024-09-20 19:19:58,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 311 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:19:58,005 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:19:58,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:19:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2024-09-20 19:20:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1741. [2024-09-20 19:20:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 883 states have (on average 1.2865232163080407) internal successors, (1136), 907 states have internal predecessors, (1136), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 793 states have call predecessors, (817), 817 states have call successors, (817) [2024-09-20 19:20:00,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2772 transitions. [2024-09-20 19:20:00,877 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2772 transitions. Word has length 137 [2024-09-20 19:20:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:20:00,878 INFO L474 AbstractCegarLoop]: Abstraction has 1741 states and 2772 transitions. [2024-09-20 19:20:00,878 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-09-20 19:20:00,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:20:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2772 transitions. [2024-09-20 19:20:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-20 19:20:00,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:20:00,880 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:20:00,895 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 19:20:01,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 19:20:01,083 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:20:01,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:20:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-09-20 19:20:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:20:01,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776050928] [2024-09-20 19:20:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:20:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:20:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:20:01,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709544169] [2024-09-20 19:20:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:20:01,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:20:01,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:20:01,102 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:20:01,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 19:20:01,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:20:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:20:01,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-20 19:20:01,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:20:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 82 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 19:20:02,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:20:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-20 19:20:06,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:20:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776050928] [2024-09-20 19:20:06,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:20:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709544169] [2024-09-20 19:20:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709544169] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:20:06,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:20:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2024-09-20 19:20:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640393043] [2024-09-20 19:20:06,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:20:06,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 19:20:06,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:20:06,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 19:20:06,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 19:20:06,653 INFO L87 Difference]: Start difference. First operand 1741 states and 2772 transitions. Second operand has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 19:20:13,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:40,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 19:20:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:20:57,752 INFO L93 Difference]: Finished difference Result 2076 states and 3230 transitions. [2024-09-20 19:20:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-20 19:20:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 140 [2024-09-20 19:20:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:20:57,761 INFO L225 Difference]: With dead ends: 2076 [2024-09-20 19:20:57,761 INFO L226 Difference]: Without dead ends: 1901 [2024-09-20 19:20:57,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=2237, Invalid=8682, Unknown=1, NotChecked=0, Total=10920 [2024-09-20 19:20:57,764 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:20:57,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 908 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2024-09-20 19:20:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2024-09-20 19:21:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1774. [2024-09-20 19:21:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 907 states have (on average 1.2855567805953694) internal successors, (1166), 936 states have internal predecessors, (1166), 827 states have call successors, (827), 41 states have call predecessors, (827), 39 states have return successors, (825), 796 states have call predecessors, (825), 825 states have call successors, (825) [2024-09-20 19:21:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2818 transitions. [2024-09-20 19:21:01,768 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2818 transitions. Word has length 140 [2024-09-20 19:21:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:21:01,768 INFO L474 AbstractCegarLoop]: Abstraction has 1774 states and 2818 transitions. [2024-09-20 19:21:01,768 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-09-20 19:21:01,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2818 transitions. [2024-09-20 19:21:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-20 19:21:01,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:21:01,770 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:21:01,786 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 19:21:01,974 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 19:21:01,975 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:21:01,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1581427678, now seen corresponding path program 9 times [2024-09-20 19:21:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:21:01,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387679956] [2024-09-20 19:21:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:21:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:21:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:21:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487441364] [2024-09-20 19:21:01,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:21:01,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:21:01,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:21:01,994 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:21:01,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 19:21:02,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 19:21:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:21:02,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 19:21:02,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:21:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 70 proven. 88 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 19:21:03,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:21:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:21:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387679956] [2024-09-20 19:21:08,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:21:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487441364] [2024-09-20 19:21:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487441364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:21:08,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:21:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 19:21:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377657153] [2024-09-20 19:21:08,333 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:21:08,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:21:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:21:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:21:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:21:08,334 INFO L87 Difference]: Start difference. First operand 1774 states and 2818 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:21:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:21:14,758 INFO L93 Difference]: Finished difference Result 2041 states and 3249 transitions. [2024-09-20 19:21:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:21:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2024-09-20 19:21:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:21:14,772 INFO L225 Difference]: With dead ends: 2041 [2024-09-20 19:21:14,775 INFO L226 Difference]: Without dead ends: 2036 [2024-09-20 19:21:14,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 19:21:14,776 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:21:14,776 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 622 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 19:21:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2024-09-20 19:21:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1822. [2024-09-20 19:21:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 930 states have (on average 1.2860215053763442) internal successors, (1196), 959 states have internal predecessors, (1196), 851 states have call successors, (851), 42 states have call predecessors, (851), 40 states have return successors, (849), 820 states have call predecessors, (849), 849 states have call successors, (849) [2024-09-20 19:21:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2896 transitions. [2024-09-20 19:21:18,961 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2896 transitions. Word has length 142 [2024-09-20 19:21:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:21:18,961 INFO L474 AbstractCegarLoop]: Abstraction has 1822 states and 2896 transitions. [2024-09-20 19:21:18,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:21:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2896 transitions. [2024-09-20 19:21:18,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-20 19:21:18,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:21:18,964 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:21:18,976 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 19:21:19,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 19:21:19,168 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:21:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1042986500, now seen corresponding path program 10 times [2024-09-20 19:21:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:21:19,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311122138] [2024-09-20 19:21:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:21:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:21:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:21:19,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182764195] [2024-09-20 19:21:19,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:21:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:21:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:21:19,194 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:21:19,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 19:21:19,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:21:19,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:21:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-09-20 19:21:19,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:21:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 76 proven. 94 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-20 19:21:21,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:21:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:21:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311122138] [2024-09-20 19:21:25,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:21:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182764195] [2024-09-20 19:21:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182764195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:21:25,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:21:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 19:21:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574539941] [2024-09-20 19:21:25,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:21:25,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 19:21:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:21:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 19:21:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 19:21:25,486 INFO L87 Difference]: Start difference. First operand 1822 states and 2896 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:21:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:21:32,004 INFO L93 Difference]: Finished difference Result 2125 states and 3361 transitions. [2024-09-20 19:21:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 19:21:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 145 [2024-09-20 19:21:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:21:32,012 INFO L225 Difference]: With dead ends: 2125 [2024-09-20 19:21:32,012 INFO L226 Difference]: Without dead ends: 2120 [2024-09-20 19:21:32,013 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 19:21:32,013 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 19:21:32,013 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 977 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 19:21:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2024-09-20 19:21:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2062. [2024-09-20 19:21:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1049 states have (on average 1.2878932316491898) internal successors, (1351), 1084 states have internal predecessors, (1351), 966 states have call successors, (966), 48 states have call predecessors, (966), 46 states have return successors, (964), 929 states have call predecessors, (964), 964 states have call successors, (964) [2024-09-20 19:21:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3281 transitions. [2024-09-20 19:21:36,821 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3281 transitions. Word has length 145 [2024-09-20 19:21:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:21:36,822 INFO L474 AbstractCegarLoop]: Abstraction has 2062 states and 3281 transitions. [2024-09-20 19:21:36,822 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-20 19:21:36,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3281 transitions. [2024-09-20 19:21:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-20 19:21:36,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:21:36,824 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:21:36,836 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 19:21:37,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 19:21:37,025 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:21:37,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:21:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash -723812761, now seen corresponding path program 11 times [2024-09-20 19:21:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:21:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341645541] [2024-09-20 19:21:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:21:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:21:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:21:37,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414207049] [2024-09-20 19:21:37,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:21:37,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:21:37,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:21:37,045 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:21:37,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 19:21:37,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-20 19:21:37,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:21:37,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-09-20 19:21:37,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:21:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 92 proven. 173 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 19:21:38,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:21:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 103 proven. 162 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-20 19:21:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:21:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341645541] [2024-09-20 19:21:47,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:21:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414207049] [2024-09-20 19:21:47,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414207049] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:21:47,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:21:47,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 53 [2024-09-20 19:21:47,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231717461] [2024-09-20 19:21:47,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:21:47,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-20 19:21:47,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:21:47,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-20 19:21:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2457, Unknown=1, NotChecked=0, Total=2756 [2024-09-20 19:21:47,296 INFO L87 Difference]: Start difference. First operand 2062 states and 3281 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 46 states have internal predecessors, (104), 19 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40)