./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/vogal-1.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/vogal-1.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 11:57:04,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 11:57:04,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 11:57:04,688 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 11:57:04,689 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 11:57:04,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 11:57:04,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 11:57:04,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 11:57:04,709 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 11:57:04,710 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 11:57:04,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 11:57:04,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 11:57:04,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 11:57:04,712 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 11:57:04,712 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 11:57:04,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 11:57:04,712 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 11:57:04,713 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 11:57:04,714 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 11:57:04,714 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 11:57:04,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 11:57:04,715 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 11:57:04,715 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 11:57:04,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 11:57:04,716 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 11:57:04,718 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 11:57:04,718 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 11:57:04,718 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 11:57:04,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:57:04,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 11:57:04,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 11:57:04,720 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 11:57:04,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 11:57:04,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 11:57:04,720 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 11:57:04,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 11:57:04,721 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 11:57:04,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 11:57:04,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 11:57:04,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 11:57:04,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 11:57:04,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 11:57:04,978 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 11:57:04,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/vogal-1.i [2024-09-20 11:57:06,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 11:57:06,311 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 11:57:06,311 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/vogal-1.i [2024-09-20 11:57:06,316 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a7d2f7c10/57a06bae4bb74a22889a61cf84a1d735/FLAG91e558c9b [2024-09-20 11:57:06,727 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a7d2f7c10/57a06bae4bb74a22889a61cf84a1d735 [2024-09-20 11:57:06,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 11:57:06,730 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 11:57:06,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 11:57:06,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 11:57:06,734 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 11:57:06,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bab0026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06, skipping insertion in model container [2024-09-20 11:57:06,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,751 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 11:57:06,876 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/loops/vogal-1.i[895,908] [2024-09-20 11:57:06,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:57:06,909 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 11:57:06,919 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/loops/vogal-1.i[895,908] [2024-09-20 11:57:06,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:57:06,943 INFO L204 MainTranslator]: Completed translation [2024-09-20 11:57:06,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06 WrapperNode [2024-09-20 11:57:06,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 11:57:06,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 11:57:06,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 11:57:06,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 11:57:06,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,964 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 11:57:06,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 11:57:06,965 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 11:57:06,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 11:57:06,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 11:57:06,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,976 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,986 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 6, 13]. 62 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 0, 11]. The 1 writes are split as follows [0, 1, 0]. [2024-09-20 11:57:06,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,987 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:06,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:07,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 11:57:07,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 11:57:07,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 11:57:07,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 11:57:07,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (1/1) ... [2024-09-20 11:57:07,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:57:07,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:07,029 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 11:57:07,031 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 11:57:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 11:57:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 11:57:07,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 11:57:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 11:57:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 11:57:07,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 11:57:07,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 11:57:07,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 11:57:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 11:57:07,125 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 11:57:07,127 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 11:57:07,289 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-20 11:57:07,289 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 11:57:07,317 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 11:57:07,317 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-20 11:57:07,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:57:07 BoogieIcfgContainer [2024-09-20 11:57:07,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 11:57:07,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 11:57:07,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 11:57:07,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 11:57:07,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:57:06" (1/3) ... [2024-09-20 11:57:07,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590beaf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:57:07, skipping insertion in model container [2024-09-20 11:57:07,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:57:06" (2/3) ... [2024-09-20 11:57:07,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590beaf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:57:07, skipping insertion in model container [2024-09-20 11:57:07,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:57:07" (3/3) ... [2024-09-20 11:57:07,325 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2024-09-20 11:57:07,337 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 11:57:07,337 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 11:57:07,376 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 11:57:07,381 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;@7bc88cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 11:57:07,382 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 11:57:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:57:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 11:57:07,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:07,392 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:07,393 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:07,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1308321975, now seen corresponding path program 1 times [2024-09-20 11:57:07,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:07,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896164029] [2024-09-20 11:57:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:57:07,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:07,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896164029] [2024-09-20 11:57:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896164029] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:57:07,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:57:07,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 11:57:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247735916] [2024-09-20 11:57:07,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:07,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 11:57:07,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 11:57:07,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 11:57:07,563 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:07,585 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2024-09-20 11:57:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 11:57:07,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 11:57:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:07,592 INFO L225 Difference]: With dead ends: 64 [2024-09-20 11:57:07,592 INFO L226 Difference]: Without dead ends: 28 [2024-09-20 11:57:07,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 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 11:57:07,597 INFO L434 NwaCegarLoop]: 41 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, 41 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 11:57:07,599 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-20 11:57:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-20 11:57:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-09-20 11:57:07,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2024-09-20 11:57:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:07,625 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-09-20 11:57:07,625 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-09-20 11:57:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 11:57:07,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:07,626 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:07,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 11:57:07,627 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:07,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 516425503, now seen corresponding path program 1 times [2024-09-20 11:57:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79893464] [2024-09-20 11:57:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:57:07,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:07,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79893464] [2024-09-20 11:57:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79893464] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:57:07,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:57:07,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 11:57:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197401527] [2024-09-20 11:57:07,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:07,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 11:57:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 11:57:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:57:07,769 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:07,802 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-09-20 11:57:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 11:57:07,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-20 11:57:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:07,805 INFO L225 Difference]: With dead ends: 63 [2024-09-20 11:57:07,805 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 11:57:07,805 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:57:07,806 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:07,807 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 11:57:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2024-09-20 11:57:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-09-20 11:57:07,816 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2024-09-20 11:57:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:07,816 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-09-20 11:57:07,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-09-20 11:57:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 11:57:07,818 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:07,818 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:07,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 11:57:07,819 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:07,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 22246406, now seen corresponding path program 1 times [2024-09-20 11:57:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269895471] [2024-09-20 11:57:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 11:57:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269895471] [2024-09-20 11:57:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269895471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629860834] [2024-09-20 11:57:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:07,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:07,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:07,977 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 11:57:07,979 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 11:57:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 11:57:08,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:57:08,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:57:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629860834] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:57:08,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:57:08,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-09-20 11:57:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967121647] [2024-09-20 11:57:08,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:08,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 11:57:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 11:57:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:57:08,092 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:08,136 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-20 11:57:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 11:57:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 11:57:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:08,137 INFO L225 Difference]: With dead ends: 53 [2024-09-20 11:57:08,137 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 11:57:08,137 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-20 11:57:08,138 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:08,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 11:57:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2024-09-20 11:57:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-09-20 11:57:08,151 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2024-09-20 11:57:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:08,151 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-09-20 11:57:08,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-09-20 11:57:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 11:57:08,154 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:08,154 INFO L216 NwaCegarLoop]: trace histogram [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 11:57:08,166 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 11:57:08,354 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 11:57:08,355 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:08,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:08,355 INFO L85 PathProgramCache]: Analyzing trace with hash 260967679, now seen corresponding path program 1 times [2024-09-20 11:57:08,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:08,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556126953] [2024-09-20 11:57:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:08,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 11:57:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:08,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556126953] [2024-09-20 11:57:08,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556126953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:08,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874530225] [2024-09-20 11:57:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:08,467 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 11:57:08,477 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 11:57:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 11:57:08,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 11:57:08,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:57:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874530225] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:57:08,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:57:08,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-09-20 11:57:08,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681711200] [2024-09-20 11:57:08,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:08,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 11:57:08,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 11:57:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-20 11:57:08,590 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:08,631 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2024-09-20 11:57:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 11:57:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 11:57:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:08,632 INFO L225 Difference]: With dead ends: 74 [2024-09-20 11:57:08,632 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 11:57:08,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-20 11:57:08,634 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:08,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 11:57:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 11:57:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-09-20 11:57:08,639 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2024-09-20 11:57:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:08,639 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-09-20 11:57:08,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:08,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-09-20 11:57:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 11:57:08,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:08,640 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:08,654 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 11:57:08,840 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 11:57:08,841 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:08,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1671267723, now seen corresponding path program 1 times [2024-09-20 11:57:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:08,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769939856] [2024-09-20 11:57:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:08,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:57:08,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769939856] [2024-09-20 11:57:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769939856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938843341] [2024-09-20 11:57:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:08,929 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 11:57:08,930 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 11:57:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:08,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 11:57:08,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:57:09,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:09,206 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-20 11:57:09,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2024-09-20 11:57:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 11:57:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938843341] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:09,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 11:57:09,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2024-09-20 11:57:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572620828] [2024-09-20 11:57:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:09,234 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 11:57:09,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 11:57:09,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-20 11:57:09,235 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:09,358 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2024-09-20 11:57:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 11:57:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-20 11:57:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:09,359 INFO L225 Difference]: With dead ends: 65 [2024-09-20 11:57:09,359 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 11:57:09,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-20 11:57:09,360 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:09,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 11:57:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-20 11:57:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-09-20 11:57:09,368 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 27 [2024-09-20 11:57:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:09,369 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-09-20 11:57:09,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:09,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-09-20 11:57:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 11:57:09,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:09,370 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:09,384 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:09,574 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 11:57:09,575 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:09,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash -400223430, now seen corresponding path program 1 times [2024-09-20 11:57:09,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:09,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121317660] [2024-09-20 11:57:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:09,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:09,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 11:57:09,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:09,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121317660] [2024-09-20 11:57:09,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121317660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:09,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156154038] [2024-09-20 11:57:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:09,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:09,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:09,680 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 11:57:09,681 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 11:57:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:09,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 11:57:09,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:09,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:57:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 11:57:09,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:09,961 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-20 11:57:09,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-09-20 11:57:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:57:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156154038] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:09,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2024-09-20 11:57:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44192432] [2024-09-20 11:57:09,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:09,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 11:57:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 11:57:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-20 11:57:09,990 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:10,149 INFO L93 Difference]: Finished difference Result 124 states and 169 transitions. [2024-09-20 11:57:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 11:57:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-20 11:57:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:10,152 INFO L225 Difference]: With dead ends: 124 [2024-09-20 11:57:10,152 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 11:57:10,152 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-09-20 11:57:10,153 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:10,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:57:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 11:57:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2024-09-20 11:57:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-20 11:57:10,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 28 [2024-09-20 11:57:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:10,168 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-20 11:57:10,168 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:10,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-20 11:57:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 11:57:10,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:10,171 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:10,183 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 11:57:10,371 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 11:57:10,372 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -461832489, now seen corresponding path program 1 times [2024-09-20 11:57:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45994924] [2024-09-20 11:57:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:10,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 11:57:10,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:10,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45994924] [2024-09-20 11:57:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45994924] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80594189] [2024-09-20 11:57:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:10,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:10,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:10,462 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 11:57:10,463 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 11:57:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:10,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 11:57:10,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:10,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:10,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 34 [2024-09-20 11:57:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 11:57:10,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:10,709 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-20 11:57:10,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2024-09-20 11:57:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 11:57:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80594189] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:10,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:10,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 9] total 18 [2024-09-20 11:57:10,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507354945] [2024-09-20 11:57:10,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:10,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 11:57:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 11:57:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:57:10,731 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:11,017 INFO L93 Difference]: Finished difference Result 152 states and 208 transitions. [2024-09-20 11:57:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 11:57:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-20 11:57:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:11,019 INFO L225 Difference]: With dead ends: 152 [2024-09-20 11:57:11,019 INFO L226 Difference]: Without dead ends: 114 [2024-09-20 11:57:11,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2024-09-20 11:57:11,020 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 323 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:11,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 210 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:57:11,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-20 11:57:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 48. [2024-09-20 11:57:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-09-20 11:57:11,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 30 [2024-09-20 11:57:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:11,030 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-09-20 11:57:11,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-09-20 11:57:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 11:57:11,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:11,032 INFO L216 NwaCegarLoop]: trace histogram [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 11:57:11,045 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 11:57:11,235 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 11:57:11,236 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:11,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash 450517516, now seen corresponding path program 1 times [2024-09-20 11:57:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:11,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171524529] [2024-09-20 11:57:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 11:57:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171524529] [2024-09-20 11:57:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171524529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431911175] [2024-09-20 11:57:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:11,321 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 11:57:11,322 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 11:57:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 11:57:11,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 11:57:11,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:57:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431911175] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:11,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 11:57:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 8 [2024-09-20 11:57:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505005625] [2024-09-20 11:57:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:57:11,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 11:57:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 11:57:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:57:11,410 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:11,435 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2024-09-20 11:57:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 11:57:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 11:57:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:11,436 INFO L225 Difference]: With dead ends: 83 [2024-09-20 11:57:11,436 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 11:57:11,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 11:57:11,437 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:11,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:57:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 11:57:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-20 11:57:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-09-20 11:57:11,448 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 34 [2024-09-20 11:57:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:11,448 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-09-20 11:57:11,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-09-20 11:57:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 11:57:11,449 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:11,449 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-09-20 11:57:11,461 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 11:57:11,649 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 11:57:11,650 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:11,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1134559415, now seen corresponding path program 1 times [2024-09-20 11:57:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964844660] [2024-09-20 11:57:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 11:57:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964844660] [2024-09-20 11:57:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964844660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851685493] [2024-09-20 11:57:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:11,738 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 11:57:11,738 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 11:57:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 11:57:11,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 11:57:11,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 11:57:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851685493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:11,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:11,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2024-09-20 11:57:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325154471] [2024-09-20 11:57:11,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:11,835 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 11:57:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 11:57:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-20 11:57:11,836 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:12,141 INFO L93 Difference]: Finished difference Result 297 states and 421 transitions. [2024-09-20 11:57:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 11:57:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 11:57:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:12,143 INFO L225 Difference]: With dead ends: 297 [2024-09-20 11:57:12,143 INFO L226 Difference]: Without dead ends: 254 [2024-09-20 11:57:12,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2024-09-20 11:57:12,144 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 288 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:12,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 233 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:57:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-20 11:57:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 65. [2024-09-20 11:57:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2024-09-20 11:57:12,167 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 37 [2024-09-20 11:57:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:12,167 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2024-09-20 11:57:12,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2024-09-20 11:57:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 11:57:12,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:12,168 INFO L216 NwaCegarLoop]: trace histogram [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 11:57:12,182 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 11:57:12,368 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 11:57:12,369 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:12,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1612339571, now seen corresponding path program 2 times [2024-09-20 11:57:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:12,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800430385] [2024-09-20 11:57:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:12,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:57:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800430385] [2024-09-20 11:57:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800430385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566727429] [2024-09-20 11:57:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:57:12,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:12,505 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 11:57:12,507 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 11:57:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:57:12,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:12,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 11:57:12,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:57:12,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:57:12,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566727429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:12,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:12,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-20 11:57:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121542825] [2024-09-20 11:57:12,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:12,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 11:57:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 11:57:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:57:12,666 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:12,920 INFO L93 Difference]: Finished difference Result 309 states and 412 transitions. [2024-09-20 11:57:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 11:57:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-20 11:57:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:12,922 INFO L225 Difference]: With dead ends: 309 [2024-09-20 11:57:12,922 INFO L226 Difference]: Without dead ends: 254 [2024-09-20 11:57:12,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:57:12,923 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 149 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:12,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 419 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:57:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-20 11:57:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 66. [2024-09-20 11:57:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-09-20 11:57:12,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 44 [2024-09-20 11:57:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:12,938 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-09-20 11:57:12,939 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:12,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-09-20 11:57:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 11:57:12,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:12,939 INFO L216 NwaCegarLoop]: trace histogram [5, 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 11:57:12,952 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 11:57:13,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:13,144 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 974810732, now seen corresponding path program 3 times [2024-09-20 11:57:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858213922] [2024-09-20 11:57:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:13,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 11:57:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858213922] [2024-09-20 11:57:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858213922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547383007] [2024-09-20 11:57:13,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:57:13,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:13,524 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 11:57:13,525 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 11:57:13,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 11:57:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:13,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 11:57:13,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 11:57:13,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 11:57:14,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547383007] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:14,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:14,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 14] total 31 [2024-09-20 11:57:14,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513628716] [2024-09-20 11:57:14,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:14,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 11:57:14,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 11:57:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-09-20 11:57:14,060 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:16,395 INFO L93 Difference]: Finished difference Result 472 states and 637 transitions. [2024-09-20 11:57:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-20 11:57:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-20 11:57:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:16,397 INFO L225 Difference]: With dead ends: 472 [2024-09-20 11:57:16,398 INFO L226 Difference]: Without dead ends: 439 [2024-09-20 11:57:16,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=10860, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 11:57:16,401 INFO L434 NwaCegarLoop]: 93 mSDtfsCounter, 638 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:16,402 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1714 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3002 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 11:57:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-20 11:57:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 113. [2024-09-20 11:57:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3148148148148149) internal successors, (142), 108 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-09-20 11:57:16,433 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 45 [2024-09-20 11:57:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:16,434 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-09-20 11:57:16,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 29 states have internal predecessors, (82), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:16,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-09-20 11:57:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 11:57:16,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:16,435 INFO L216 NwaCegarLoop]: trace histogram [5, 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 11:57:16,448 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 11:57:16,635 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 11:57:16,636 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:16,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 581783722, now seen corresponding path program 1 times [2024-09-20 11:57:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556411020] [2024-09-20 11:57:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:17,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 11:57:17,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556411020] [2024-09-20 11:57:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556411020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773019596] [2024-09-20 11:57:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:17,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:17,304 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 11:57:17,305 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 11:57:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:17,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 11:57:17,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:17,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:57:17,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 11:57:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:57:17,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:18,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:18,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-09-20 11:57:18,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:18,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2024-09-20 11:57:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 11:57:18,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773019596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:18,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 13] total 31 [2024-09-20 11:57:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799493077] [2024-09-20 11:57:18,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:18,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 11:57:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 11:57:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-09-20 11:57:18,237 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:21,576 INFO L93 Difference]: Finished difference Result 546 states and 750 transitions. [2024-09-20 11:57:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-09-20 11:57:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-20 11:57:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:21,578 INFO L225 Difference]: With dead ends: 546 [2024-09-20 11:57:21,578 INFO L226 Difference]: Without dead ends: 452 [2024-09-20 11:57:21,580 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1580, Invalid=8722, Unknown=0, NotChecked=0, Total=10302 [2024-09-20 11:57:21,581 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 515 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:21,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 427 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 11:57:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-09-20 11:57:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 233. [2024-09-20 11:57:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 228 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 301 transitions. [2024-09-20 11:57:21,674 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 301 transitions. Word has length 45 [2024-09-20 11:57:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:21,674 INFO L474 AbstractCegarLoop]: Abstraction has 233 states and 301 transitions. [2024-09-20 11:57:21,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:21,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 301 transitions. [2024-09-20 11:57:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 11:57:21,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:21,676 INFO L216 NwaCegarLoop]: trace histogram [5, 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 11:57:21,687 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 11:57:21,879 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 11:57:21,879 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:21,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1193665450, now seen corresponding path program 1 times [2024-09-20 11:57:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:21,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993568984] [2024-09-20 11:57:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:22,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 11:57:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993568984] [2024-09-20 11:57:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993568984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505731265] [2024-09-20 11:57:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:22,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:22,342 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 11:57:22,342 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 11:57:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:22,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 11:57:22,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:22,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-20 11:57:22,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:22,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-09-20 11:57:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 11:57:22,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:23,217 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:23,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 81 [2024-09-20 11:57:23,232 INFO L349 Elim1Store]: treesize reduction 25, result has 32.4 percent of original size [2024-09-20 11:57:23,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 63 [2024-09-20 11:57:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 11:57:23,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505731265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:23,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:23,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 15] total 34 [2024-09-20 11:57:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251286318] [2024-09-20 11:57:23,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:23,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 11:57:23,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 11:57:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 11:57:23,304 INFO L87 Difference]: Start difference. First operand 233 states and 301 transitions. Second operand has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:26,689 INFO L93 Difference]: Finished difference Result 680 states and 889 transitions. [2024-09-20 11:57:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 11:57:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-20 11:57:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:26,692 INFO L225 Difference]: With dead ends: 680 [2024-09-20 11:57:26,692 INFO L226 Difference]: Without dead ends: 559 [2024-09-20 11:57:26,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2214, Invalid=9558, Unknown=0, NotChecked=0, Total=11772 [2024-09-20 11:57:26,695 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 507 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:26,695 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 247 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 11:57:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-09-20 11:57:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 313. [2024-09-20 11:57:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.2597402597402598) internal successors, (388), 308 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 392 transitions. [2024-09-20 11:57:26,831 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 392 transitions. Word has length 45 [2024-09-20 11:57:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:26,831 INFO L474 AbstractCegarLoop]: Abstraction has 313 states and 392 transitions. [2024-09-20 11:57:26,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:26,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 392 transitions. [2024-09-20 11:57:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 11:57:26,832 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:26,832 INFO L216 NwaCegarLoop]: trace histogram [5, 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 11:57:26,844 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:27,032 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:27,033 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:27,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 213832426, now seen corresponding path program 1 times [2024-09-20 11:57:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:27,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068460360] [2024-09-20 11:57:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:27,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 11:57:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068460360] [2024-09-20 11:57:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068460360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147248963] [2024-09-20 11:57:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:27,766 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 11:57:27,767 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 11:57:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:27,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 11:57:27,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:28,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:57:28,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 11:57:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 11:57:28,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:28,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:28,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 56 [2024-09-20 11:57:28,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:28,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2024-09-20 11:57:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 11:57:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147248963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:28,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2024-09-20 11:57:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215572083] [2024-09-20 11:57:28,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:28,382 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 11:57:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 11:57:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2024-09-20 11:57:28,382 INFO L87 Difference]: Start difference. First operand 313 states and 392 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:28,990 INFO L93 Difference]: Finished difference Result 496 states and 612 transitions. [2024-09-20 11:57:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 11:57:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-20 11:57:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:28,992 INFO L225 Difference]: With dead ends: 496 [2024-09-20 11:57:28,992 INFO L226 Difference]: Without dead ends: 439 [2024-09-20 11:57:28,993 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 11:57:28,993 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 251 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:28,993 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 235 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:57:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-20 11:57:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 310. [2024-09-20 11:57:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.2524590163934426) internal successors, (382), 305 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 386 transitions. [2024-09-20 11:57:29,123 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 386 transitions. Word has length 45 [2024-09-20 11:57:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:29,124 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 386 transitions. [2024-09-20 11:57:29,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:29,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 386 transitions. [2024-09-20 11:57:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 11:57:29,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:29,125 INFO L216 NwaCegarLoop]: trace histogram [5, 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 11:57:29,136 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:29,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 11:57:29,328 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:29,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 941187050, now seen corresponding path program 1 times [2024-09-20 11:57:29,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:29,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720569260] [2024-09-20 11:57:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:29,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:30,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 11:57:30,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720569260] [2024-09-20 11:57:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720569260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106851648] [2024-09-20 11:57:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:30,098 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 11:57:30,100 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 11:57:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:30,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 11:57:30,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:30,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-09-20 11:57:30,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:57:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 11:57:30,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:30,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:30,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2024-09-20 11:57:30,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:30,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2024-09-20 11:57:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 11:57:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106851648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:30,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 28 [2024-09-20 11:57:30,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801850942] [2024-09-20 11:57:30,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:30,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 11:57:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 11:57:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2024-09-20 11:57:30,657 INFO L87 Difference]: Start difference. First operand 310 states and 386 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:31,280 INFO L93 Difference]: Finished difference Result 507 states and 629 transitions. [2024-09-20 11:57:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 11:57:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-20 11:57:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:31,283 INFO L225 Difference]: With dead ends: 507 [2024-09-20 11:57:31,283 INFO L226 Difference]: Without dead ends: 463 [2024-09-20 11:57:31,283 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 11:57:31,284 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:31,284 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 337 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:57:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-09-20 11:57:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 320. [2024-09-20 11:57:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.2412698412698413) internal successors, (391), 315 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 395 transitions. [2024-09-20 11:57:31,423 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 395 transitions. Word has length 45 [2024-09-20 11:57:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:31,423 INFO L474 AbstractCegarLoop]: Abstraction has 320 states and 395 transitions. [2024-09-20 11:57:31,423 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:31,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 395 transitions. [2024-09-20 11:57:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 11:57:31,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:31,424 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-09-20 11:57:31,436 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 11:57:31,624 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 11:57:31,624 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:31,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -128402447, now seen corresponding path program 1 times [2024-09-20 11:57:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:31,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262295878] [2024-09-20 11:57:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:31,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 11:57:31,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262295878] [2024-09-20 11:57:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262295878] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333050882] [2024-09-20 11:57:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:31,756 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 11:57:31,757 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 11:57:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:31,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 11:57:31,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:32,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:57:32,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:32,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-09-20 11:57:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-20 11:57:32,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:32,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:32,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2024-09-20 11:57:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 11:57:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333050882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:32,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:32,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 15] total 33 [2024-09-20 11:57:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596348286] [2024-09-20 11:57:32,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:32,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 11:57:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 11:57:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 11:57:32,837 INFO L87 Difference]: Start difference. First operand 320 states and 395 transitions. Second operand has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:34,248 INFO L93 Difference]: Finished difference Result 1219 states and 1523 transitions. [2024-09-20 11:57:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 11:57:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2024-09-20 11:57:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:34,252 INFO L225 Difference]: With dead ends: 1219 [2024-09-20 11:57:34,252 INFO L226 Difference]: Without dead ends: 939 [2024-09-20 11:57:34,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 11:57:34,253 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 304 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:34,253 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 754 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 11:57:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2024-09-20 11:57:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 408. [2024-09-20 11:57:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.2307692307692308) internal successors, (496), 403 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 500 transitions. [2024-09-20 11:57:34,455 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 500 transitions. Word has length 54 [2024-09-20 11:57:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:34,455 INFO L474 AbstractCegarLoop]: Abstraction has 408 states and 500 transitions. [2024-09-20 11:57:34,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:34,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 500 transitions. [2024-09-20 11:57:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 11:57:34,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:34,456 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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 11:57:34,469 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 11:57:34,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 11:57:34,657 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:34,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1628474760, now seen corresponding path program 2 times [2024-09-20 11:57:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260336473] [2024-09-20 11:57:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:35,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 11:57:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260336473] [2024-09-20 11:57:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260336473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505282982] [2024-09-20 11:57:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:57:35,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:35,124 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 11:57:35,125 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 11:57:35,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:57:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:35,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 11:57:35,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:35,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:35,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 15 [2024-09-20 11:57:35,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:57:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 11:57:35,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:35,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:35,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 95 [2024-09-20 11:57:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 11:57:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505282982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:36,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 19] total 48 [2024-09-20 11:57:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712913657] [2024-09-20 11:57:36,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:36,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 11:57:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 11:57:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 11:57:36,539 INFO L87 Difference]: Start difference. First operand 408 states and 500 transitions. Second operand has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:38,020 INFO L93 Difference]: Finished difference Result 640 states and 787 transitions. [2024-09-20 11:57:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 11:57:38,020 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-09-20 11:57:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:38,022 INFO L225 Difference]: With dead ends: 640 [2024-09-20 11:57:38,022 INFO L226 Difference]: Without dead ends: 556 [2024-09-20 11:57:38,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1125, Invalid=5847, Unknown=0, NotChecked=0, Total=6972 [2024-09-20 11:57:38,024 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:38,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 526 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 11:57:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-09-20 11:57:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 379. [2024-09-20 11:57:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.2352941176470589) internal successors, (462), 374 states have internal predecessors, (462), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 466 transitions. [2024-09-20 11:57:38,222 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 466 transitions. Word has length 55 [2024-09-20 11:57:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:38,222 INFO L474 AbstractCegarLoop]: Abstraction has 379 states and 466 transitions. [2024-09-20 11:57:38,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3125) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:38,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 466 transitions. [2024-09-20 11:57:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 11:57:38,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:38,223 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2024-09-20 11:57:38,235 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:38,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 11:57:38,423 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:38,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -885254672, now seen corresponding path program 3 times [2024-09-20 11:57:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984029132] [2024-09-20 11:57:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:38,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 11:57:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984029132] [2024-09-20 11:57:38,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984029132] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:38,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315811651] [2024-09-20 11:57:38,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:57:38,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:38,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:38,850 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 11:57:38,851 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 11:57:38,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 11:57:38,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:38,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 11:57:39,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:39,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:39,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2024-09-20 11:57:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 11:57:39,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:40,037 INFO L349 Elim1Store]: treesize reduction 5, result has 95.6 percent of original size [2024-09-20 11:57:40,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 160 [2024-09-20 11:57:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 11:57:40,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315811651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:40,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 12] total 27 [2024-09-20 11:57:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129924335] [2024-09-20 11:57:40,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:40,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 11:57:40,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:40,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 11:57:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2024-09-20 11:57:40,191 INFO L87 Difference]: Start difference. First operand 379 states and 466 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:40,767 INFO L93 Difference]: Finished difference Result 560 states and 696 transitions. [2024-09-20 11:57:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 11:57:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2024-09-20 11:57:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:40,770 INFO L225 Difference]: With dead ends: 560 [2024-09-20 11:57:40,770 INFO L226 Difference]: Without dead ends: 555 [2024-09-20 11:57:40,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-09-20 11:57:40,770 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 176 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:40,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 238 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:57:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-20 11:57:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 348. [2024-09-20 11:57:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.2303206997084548) internal successors, (422), 343 states have internal predecessors, (422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 426 transitions. [2024-09-20 11:57:40,979 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 426 transitions. Word has length 56 [2024-09-20 11:57:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:40,980 INFO L474 AbstractCegarLoop]: Abstraction has 348 states and 426 transitions. [2024-09-20 11:57:40,980 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:40,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 426 transitions. [2024-09-20 11:57:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 11:57:40,981 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:40,981 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-20 11:57:40,994 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 11:57:41,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:41,181 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:41,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash 828990910, now seen corresponding path program 4 times [2024-09-20 11:57:41,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56477135] [2024-09-20 11:57:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:42,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 11:57:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56477135] [2024-09-20 11:57:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56477135] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015079151] [2024-09-20 11:57:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 11:57:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:42,235 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 11:57:42,236 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 11:57:42,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 11:57:42,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:42,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 11:57:42,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:42,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:57:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 11:57:42,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:42,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:42,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2024-09-20 11:57:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 11:57:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015079151] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:42,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12] total 36 [2024-09-20 11:57:42,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304127318] [2024-09-20 11:57:42,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:42,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 11:57:42,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 11:57:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 11:57:42,940 INFO L87 Difference]: Start difference. First operand 348 states and 426 transitions. Second operand has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:44,557 INFO L93 Difference]: Finished difference Result 1668 states and 2152 transitions. [2024-09-20 11:57:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 11:57:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-20 11:57:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:44,562 INFO L225 Difference]: With dead ends: 1668 [2024-09-20 11:57:44,562 INFO L226 Difference]: Without dead ends: 1431 [2024-09-20 11:57:44,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 11:57:44,563 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 280 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:44,563 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 465 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:57:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2024-09-20 11:57:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 724. [2024-09-20 11:57:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 719 states have (on average 1.2600834492350488) internal successors, (906), 719 states have internal predecessors, (906), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 910 transitions. [2024-09-20 11:57:45,112 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 910 transitions. Word has length 66 [2024-09-20 11:57:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:45,112 INFO L474 AbstractCegarLoop]: Abstraction has 724 states and 910 transitions. [2024-09-20 11:57:45,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.388888888888889) internal successors, (122), 36 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:45,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 910 transitions. [2024-09-20 11:57:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 11:57:45,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:45,113 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-20 11:57:45,125 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 11:57:45,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:45,314 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:45,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash -289774206, now seen corresponding path program 5 times [2024-09-20 11:57:45,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:45,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347463142] [2024-09-20 11:57:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:45,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:46,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 11:57:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347463142] [2024-09-20 11:57:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347463142] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189309424] [2024-09-20 11:57:46,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 11:57:46,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:46,637 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 11:57:46,638 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 11:57:46,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 11:57:46,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:46,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 11:57:46,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:47,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:57:47,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 11:57:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 11:57:47,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:47,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:47,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-09-20 11:57:47,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:47,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2024-09-20 11:57:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 11:57:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189309424] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:47,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:47,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 17] total 48 [2024-09-20 11:57:47,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656862365] [2024-09-20 11:57:47,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:47,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 11:57:47,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 11:57:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 11:57:47,815 INFO L87 Difference]: Start difference. First operand 724 states and 910 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:50,349 INFO L93 Difference]: Finished difference Result 1984 states and 2487 transitions. [2024-09-20 11:57:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-20 11:57:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-20 11:57:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:50,353 INFO L225 Difference]: With dead ends: 1984 [2024-09-20 11:57:50,353 INFO L226 Difference]: Without dead ends: 1257 [2024-09-20 11:57:50,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=803, Invalid=5049, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 11:57:50,355 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 257 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:50,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 668 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 11:57:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2024-09-20 11:57:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1078. [2024-09-20 11:57:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1073 states have (on average 1.2273998136067101) internal successors, (1317), 1073 states have internal predecessors, (1317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1321 transitions. [2024-09-20 11:57:51,103 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1321 transitions. Word has length 66 [2024-09-20 11:57:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:51,104 INFO L474 AbstractCegarLoop]: Abstraction has 1078 states and 1321 transitions. [2024-09-20 11:57:51,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1321 transitions. [2024-09-20 11:57:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 11:57:51,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:51,105 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-20 11:57:51,117 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:51,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:51,306 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:51,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 571791422, now seen corresponding path program 6 times [2024-09-20 11:57:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307256282] [2024-09-20 11:57:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:52,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 11:57:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:52,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307256282] [2024-09-20 11:57:52,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307256282] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:52,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480120159] [2024-09-20 11:57:52,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 11:57:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:52,354 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 11:57:52,355 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 11:57:52,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-20 11:57:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:52,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 11:57:52,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:52,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-09-20 11:57:52,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:57:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 11:57:52,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:53,087 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-09-20 11:57:53,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-09-20 11:57:53,097 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-20 11:57:53,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2024-09-20 11:57:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 11:57:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480120159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:53,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 17] total 42 [2024-09-20 11:57:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629031123] [2024-09-20 11:57:53,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:53,166 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 11:57:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 11:57:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 11:57:53,167 INFO L87 Difference]: Start difference. First operand 1078 states and 1321 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:55,250 INFO L93 Difference]: Finished difference Result 1802 states and 2163 transitions. [2024-09-20 11:57:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 11:57:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-20 11:57:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:55,255 INFO L225 Difference]: With dead ends: 1802 [2024-09-20 11:57:55,255 INFO L226 Difference]: Without dead ends: 1162 [2024-09-20 11:57:55,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=898, Invalid=5108, Unknown=0, NotChecked=0, Total=6006 [2024-09-20 11:57:55,257 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 256 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:55,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 641 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 11:57:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-20 11:57:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 973. [2024-09-20 11:57:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1900826446280992) internal successors, (1152), 968 states have internal predecessors, (1152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1156 transitions. [2024-09-20 11:57:55,920 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1156 transitions. Word has length 66 [2024-09-20 11:57:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:55,920 INFO L474 AbstractCegarLoop]: Abstraction has 973 states and 1156 transitions. [2024-09-20 11:57:55,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:55,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1156 transitions. [2024-09-20 11:57:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 11:57:55,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:55,922 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-20 11:57:55,935 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:56,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 11:57:56,122 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 378012418, now seen corresponding path program 7 times [2024-09-20 11:57:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391223659] [2024-09-20 11:57:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:57,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 11:57:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:57,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391223659] [2024-09-20 11:57:57,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391223659] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759112401] [2024-09-20 11:57:57,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 11:57:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:57,398 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 11:57:57,398 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 11:57:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:57,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 11:57:57,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:57,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-09-20 11:57:57,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:57:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 11:57:57,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:58,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:58,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-09-20 11:57:58,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:58,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2024-09-20 11:57:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 11:57:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759112401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:58,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 44 [2024-09-20 11:57:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626249474] [2024-09-20 11:57:58,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:58,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 11:57:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 11:57:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 11:57:58,284 INFO L87 Difference]: Start difference. First operand 973 states and 1156 transitions. Second operand has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:00,419 INFO L93 Difference]: Finished difference Result 1248 states and 1460 transitions. [2024-09-20 11:58:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-20 11:58:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-20 11:58:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:00,425 INFO L225 Difference]: With dead ends: 1248 [2024-09-20 11:58:00,425 INFO L226 Difference]: Without dead ends: 1073 [2024-09-20 11:58:00,425 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=4791, Unknown=0, NotChecked=0, Total=5550 [2024-09-20 11:58:00,426 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 298 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:00,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 545 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 11:58:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2024-09-20 11:58:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 955. [2024-09-20 11:58:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 950 states have (on average 1.1831578947368422) internal successors, (1124), 950 states have internal predecessors, (1124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1128 transitions. [2024-09-20 11:58:01,088 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1128 transitions. Word has length 66 [2024-09-20 11:58:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:58:01,088 INFO L474 AbstractCegarLoop]: Abstraction has 955 states and 1128 transitions. [2024-09-20 11:58:01,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1128 transitions. [2024-09-20 11:58:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 11:58:01,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:58:01,090 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-20 11:58:01,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 11:58:01,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 11:58:01,296 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:58:01,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1621380802, now seen corresponding path program 8 times [2024-09-20 11:58:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:58:01,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292739912] [2024-09-20 11:58:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:58:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:58:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:02,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:58:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 11:58:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:58:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292739912] [2024-09-20 11:58:02,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292739912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:58:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756533042] [2024-09-20 11:58:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:58:02,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:58:02,295 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 11:58:02,296 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 11:58:02,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:58:02,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:58:02,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 11:58:02,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:58:02,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-09-20 11:58:02,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-09-20 11:58:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 11:58:02,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:58:02,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:58:02,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2024-09-20 11:58:02,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:58:02,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2024-09-20 11:58:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 11:58:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756533042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:02,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 36 [2024-09-20 11:58:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824899116] [2024-09-20 11:58:02,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:02,902 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 11:58:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 11:58:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 11:58:02,903 INFO L87 Difference]: Start difference. First operand 955 states and 1128 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:04,283 INFO L93 Difference]: Finished difference Result 1206 states and 1394 transitions. [2024-09-20 11:58:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 11:58:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2024-09-20 11:58:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:04,287 INFO L225 Difference]: With dead ends: 1206 [2024-09-20 11:58:04,287 INFO L226 Difference]: Without dead ends: 1107 [2024-09-20 11:58:04,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=430, Invalid=2222, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 11:58:04,288 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 238 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:04,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 352 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:58:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2024-09-20 11:58:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 934. [2024-09-20 11:58:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 929 states have (on average 1.1765339074273413) internal successors, (1093), 929 states have internal predecessors, (1093), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1097 transitions. [2024-09-20 11:58:04,951 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1097 transitions. Word has length 66 [2024-09-20 11:58:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:58:04,952 INFO L474 AbstractCegarLoop]: Abstraction has 934 states and 1097 transitions. [2024-09-20 11:58:04,952 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:04,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1097 transitions. [2024-09-20 11:58:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-20 11:58:04,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:58:04,953 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 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] [2024-09-20 11:58:04,965 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 11:58:05,154 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:05,154 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:58:05,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash 128915325, now seen corresponding path program 9 times [2024-09-20 11:58:05,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:58:05,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290966356] [2024-09-20 11:58:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:58:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:58:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:05,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:58:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 11:58:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:58:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290966356] [2024-09-20 11:58:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290966356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:58:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485389642] [2024-09-20 11:58:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:58:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:58:05,326 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 11:58:05,326 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 11:58:05,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 11:58:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:58:05,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 11:58:05,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:58:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 11:58:05,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:58:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 11:58:05,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485389642] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:05,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:05,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-09-20 11:58:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552768995] [2024-09-20 11:58:05,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:05,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 11:58:05,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 11:58:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:58:05,670 INFO L87 Difference]: Start difference. First operand 934 states and 1097 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:06,243 INFO L93 Difference]: Finished difference Result 1182 states and 1355 transitions. [2024-09-20 11:58:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 11:58:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2024-09-20 11:58:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:06,247 INFO L225 Difference]: With dead ends: 1182 [2024-09-20 11:58:06,247 INFO L226 Difference]: Without dead ends: 760 [2024-09-20 11:58:06,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:58:06,248 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:06,248 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 237 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:58:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-20 11:58:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2024-09-20 11:58:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 755 states have (on average 1.1629139072847683) internal successors, (878), 755 states have internal predecessors, (878), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 882 transitions. [2024-09-20 11:58:06,769 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 882 transitions. Word has length 75 [2024-09-20 11:58:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:58:06,769 INFO L474 AbstractCegarLoop]: Abstraction has 760 states and 882 transitions. [2024-09-20 11:58:06,770 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 882 transitions. [2024-09-20 11:58:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-20 11:58:06,771 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:58:06,771 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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] [2024-09-20 11:58:06,784 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-20 11:58:06,971 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 11:58:06,971 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:58:06,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash 846171212, now seen corresponding path program 10 times [2024-09-20 11:58:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:58:06,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855948194] [2024-09-20 11:58:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:58:06,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:58:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:07,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:58:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 43 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 11:58:07,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:58:07,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855948194] [2024-09-20 11:58:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855948194] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:58:07,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724084254] [2024-09-20 11:58:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 11:58:07,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:58:07,640 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 11:58:07,640 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 11:58:07,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 11:58:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:58:07,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 11:58:07,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:58:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 61 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 11:58:07,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:58:08,164 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-20 11:58:08,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2024-09-20 11:58:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 11:58:08,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724084254] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:08,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 11] total 34 [2024-09-20 11:58:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677255247] [2024-09-20 11:58:08,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:08,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 11:58:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 11:58:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 11:58:08,212 INFO L87 Difference]: Start difference. First operand 760 states and 882 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:09,520 INFO L93 Difference]: Finished difference Result 1140 states and 1324 transitions. [2024-09-20 11:58:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 11:58:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2024-09-20 11:58:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:09,523 INFO L225 Difference]: With dead ends: 1140 [2024-09-20 11:58:09,523 INFO L226 Difference]: Without dead ends: 935 [2024-09-20 11:58:09,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 11:58:09,524 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:09,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 904 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:58:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2024-09-20 11:58:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 678. [2024-09-20 11:58:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 673 states have (on average 1.1693907875185736) internal successors, (787), 673 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 791 transitions. [2024-09-20 11:58:09,988 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 791 transitions. Word has length 76 [2024-09-20 11:58:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:58:09,988 INFO L474 AbstractCegarLoop]: Abstraction has 678 states and 791 transitions. [2024-09-20 11:58:09,988 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:09,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 791 transitions. [2024-09-20 11:58:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 11:58:09,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:58:09,990 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 11:58:10,003 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-20 11:58:10,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 11:58:10,191 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:58:10,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash -984218334, now seen corresponding path program 11 times [2024-09-20 11:58:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:58:10,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859592212] [2024-09-20 11:58:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:58:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:58:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:10,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:58:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 11:58:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:58:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859592212] [2024-09-20 11:58:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859592212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:58:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445806863] [2024-09-20 11:58:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 11:58:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:58:10,597 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 11:58:10,598 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 11:58:11,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-20 11:58:11,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:58:11,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-20 11:58:11,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:58:11,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-09-20 11:58:11,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-09-20 11:58:11,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 11:58:11,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:58:11,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-09-20 11:58:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 11:58:11,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:58:12,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:58:12,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 59 [2024-09-20 11:58:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 11:58:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445806863] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:12,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 27, 16] total 46 [2024-09-20 11:58:12,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829992406] [2024-09-20 11:58:12,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:12,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 11:58:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 11:58:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 11:58:12,811 INFO L87 Difference]: Start difference. First operand 678 states and 791 transitions. Second operand has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:15,879 INFO L93 Difference]: Finished difference Result 2907 states and 3507 transitions. [2024-09-20 11:58:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-20 11:58:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2024-09-20 11:58:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:15,886 INFO L225 Difference]: With dead ends: 2907 [2024-09-20 11:58:15,886 INFO L226 Difference]: Without dead ends: 2247 [2024-09-20 11:58:15,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=976, Invalid=6164, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 11:58:15,888 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 535 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:15,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1357 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 11:58:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2024-09-20 11:58:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 927. [2024-09-20 11:58:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 922 states have (on average 1.1529284164859002) internal successors, (1063), 922 states have internal predecessors, (1063), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1067 transitions. [2024-09-20 11:58:16,587 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1067 transitions. Word has length 77 [2024-09-20 11:58:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:58:16,587 INFO L474 AbstractCegarLoop]: Abstraction has 927 states and 1067 transitions. [2024-09-20 11:58:16,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:16,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1067 transitions. [2024-09-20 11:58:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-20 11:58:16,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:58:16,590 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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 11:58:16,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-20 11:58:16,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 11:58:16,791 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:58:16,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:58:16,791 INFO L85 PathProgramCache]: Analyzing trace with hash 776423298, now seen corresponding path program 12 times [2024-09-20 11:58:16,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:58:16,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615300464] [2024-09-20 11:58:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:58:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:58:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:16,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:58:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:58:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-20 11:58:16,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:58:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615300464] [2024-09-20 11:58:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615300464] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:58:16,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802877726] [2024-09-20 11:58:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 11:58:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:58:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:58:16,992 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 11:58:16,993 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 11:58:17,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 11:58:17,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:58:17,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 11:58:17,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:58:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 46 proven. 59 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 11:58:17,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:58:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 46 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 11:58:18,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802877726] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:18,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:18,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22, 17] total 44 [2024-09-20 11:58:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376993730] [2024-09-20 11:58:18,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:18,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 11:58:18,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 11:58:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 11:58:18,445 INFO L87 Difference]: Start difference. First operand 927 states and 1067 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:58:40,113 WARN L293 SmtUtils]: Spent 20.54s on a formula simplification. DAG size of input: 67 DAG size of output: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 11:58:57,194 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 11:58:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:58:59,898 INFO L93 Difference]: Finished difference Result 3015 states and 3609 transitions. [2024-09-20 11:58:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-20 11:58:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2024-09-20 11:58:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:58:59,905 INFO L225 Difference]: With dead ends: 3015 [2024-09-20 11:58:59,905 INFO L226 Difference]: Without dead ends: 2045 [2024-09-20 11:58:59,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=1109, Invalid=8011, Unknown=0, NotChecked=0, Total=9120 [2024-09-20 11:58:59,907 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 592 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 11:58:59,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1101 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 11:58:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2024-09-20 11:59:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1889. [2024-09-20 11:59:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1884 states have (on average 1.1857749469214438) internal successors, (2234), 1884 states have internal predecessors, (2234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2238 transitions. [2024-09-20 11:59:01,568 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2238 transitions. Word has length 80 [2024-09-20 11:59:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:01,568 INFO L474 AbstractCegarLoop]: Abstraction has 1889 states and 2238 transitions. [2024-09-20 11:59:01,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:01,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2238 transitions. [2024-09-20 11:59:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 11:59:01,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:01,571 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:01,584 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 11:59:01,771 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 11:59:01,771 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:01,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1743097550, now seen corresponding path program 13 times [2024-09-20 11:59:01,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:01,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293300373] [2024-09-20 11:59:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:02,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 11:59:02,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293300373] [2024-09-20 11:59:02,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293300373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889344114] [2024-09-20 11:59:02,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 11:59:02,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:02,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:59:02,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 11:59:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:02,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 11:59:02,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 11:59:02,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 11:59:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889344114] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:02,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:02,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-09-20 11:59:02,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028072926] [2024-09-20 11:59:02,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:02,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 11:59:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:02,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 11:59:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-09-20 11:59:02,590 INFO L87 Difference]: Start difference. First operand 1889 states and 2238 transitions. Second operand has 25 states, 25 states have (on average 5.68) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:05,321 INFO L93 Difference]: Finished difference Result 2727 states and 3202 transitions. [2024-09-20 11:59:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 11:59:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2024-09-20 11:59:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:05,330 INFO L225 Difference]: With dead ends: 2727 [2024-09-20 11:59:05,331 INFO L226 Difference]: Without dead ends: 2714 [2024-09-20 11:59:05,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2024-09-20 11:59:05,331 INFO L434 NwaCegarLoop]: 135 mSDtfsCounter, 187 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:05,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1844 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:59:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2024-09-20 11:59:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2314. [2024-09-20 11:59:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2309 states have (on average 1.1883932438284972) internal successors, (2744), 2309 states have internal predecessors, (2744), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2748 transitions. [2024-09-20 11:59:07,545 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2748 transitions. Word has length 87 [2024-09-20 11:59:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:07,545 INFO L474 AbstractCegarLoop]: Abstraction has 2314 states and 2748 transitions. [2024-09-20 11:59:07,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 23 states have internal predecessors, (142), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:07,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2748 transitions. [2024-09-20 11:59:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 11:59:07,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:07,548 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:07,561 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 11:59:07,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:07,749 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:07,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1965063732, now seen corresponding path program 14 times [2024-09-20 11:59:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408509177] [2024-09-20 11:59:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:08,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 11:59:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408509177] [2024-09-20 11:59:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408509177] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315934693] [2024-09-20 11:59:08,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:59:08,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:08,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:08,948 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:59:08,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 11:59:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:59:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:59:09,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-20 11:59:09,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:09,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-09-20 11:59:09,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 11:59:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 35 proven. 135 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 11:59:09,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:10,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:10,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2024-09-20 11:59:10,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:59:10,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 35 [2024-09-20 11:59:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-20 11:59:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315934693] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:10,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:10,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 14] total 58 [2024-09-20 11:59:10,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180087722] [2024-09-20 11:59:10,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:10,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-20 11:59:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-20 11:59:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 11:59:10,234 INFO L87 Difference]: Start difference. First operand 2314 states and 2748 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:15,141 INFO L93 Difference]: Finished difference Result 3797 states and 4500 transitions. [2024-09-20 11:59:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 11:59:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2024-09-20 11:59:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:15,152 INFO L225 Difference]: With dead ends: 3797 [2024-09-20 11:59:15,152 INFO L226 Difference]: Without dead ends: 3748 [2024-09-20 11:59:15,153 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=832, Invalid=6824, Unknown=0, NotChecked=0, Total=7656 [2024-09-20 11:59:15,153 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 438 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:15,153 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1599 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 11:59:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2024-09-20 11:59:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3607. [2024-09-20 11:59:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3602 states have (on average 1.191282620766241) internal successors, (4291), 3602 states have internal predecessors, (4291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 4295 transitions. [2024-09-20 11:59:18,552 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 4295 transitions. Word has length 87 [2024-09-20 11:59:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:18,552 INFO L474 AbstractCegarLoop]: Abstraction has 3607 states and 4295 transitions. [2024-09-20 11:59:18,552 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 4295 transitions. [2024-09-20 11:59:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 11:59:18,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:18,557 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:18,569 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-20 11:59:18,757 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 11:59:18,757 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:18,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1684563720, now seen corresponding path program 15 times [2024-09-20 11:59:18,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:18,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485643748] [2024-09-20 11:59:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:18,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 11:59:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485643748] [2024-09-20 11:59:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485643748] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868810356] [2024-09-20 11:59:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:59:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:20,203 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 11:59:20,204 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 11:59:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 11:59:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:59:20,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-09-20 11:59:20,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:20,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 11:59:20,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 11:59:20,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 11:59:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 11:59:22,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 11:59:22,978 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-09-20 11:59:22,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 30 [2024-09-20 11:59:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 21 proven. 143 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 11:59:23,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:00:18,828 WARN L293 SmtUtils]: Spent 17.16s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:00:26,800 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int#1| |c_main_~#input_string~0.base|)) (.cse12 (mod (+ c_main_~i~0 2) 4294967296))) (let ((.cse2 (select .cse6 (+ .cse12 (- 4294967296) |c_main_~#input_string~0.offset|))) (.cse3 (< .cse12 2147483648)) (.cse1 (< 2147483647 .cse12)) (.cse0 (select .cse6 (+ .cse12 |c_main_~#input_string~0.offset|))) (.cse7 (select |c_#memory_int#2| |c_main_~#vogal_array~0.base|)) (.cse8 (mod (+ c_main_~j~0 1) 4294967296))) (or (and (or (= .cse0 0) .cse1) (or (= .cse2 0) .cse3)) (let ((.cse4 (mod c_main_~i~0 4294967296)) (.cse5 (select .cse7 (+ .cse8 |c_main_~#vogal_array~0.offset|)))) (and (or (< 2147483647 .cse4) (= .cse5 (select .cse6 (+ .cse4 |c_main_~#input_string~0.offset|)))) (or (< .cse4 2147483648) (= (select .cse6 (+ .cse4 (- 4294967296) |c_main_~#input_string~0.offset|)) .cse5)))) (let ((.cse9 (select .cse7 (+ |c_main_~#vogal_array~0.offset| 1)))) (and (or (= .cse2 .cse9) .cse3) (or .cse1 (= .cse0 .cse9)))) (let ((.cse10 (select .cse7 |c_main_~#vogal_array~0.offset|)) (.cse11 (mod (+ c_main_~i~0 1) 4294967296))) (and (or (not (= .cse10 (select .cse6 (+ .cse11 (- 4294967296) |c_main_~#input_string~0.offset|)))) (< .cse11 2147483648)) (or (not (= .cse10 (select .cse6 (+ .cse11 |c_main_~#input_string~0.offset|)))) (< 2147483647 .cse11)))) (< 1 .cse8)))) is different from true [2024-09-20 12:00:40,827 WARN L293 SmtUtils]: Spent 12.01s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)