./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/mcmillan2006.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/mcmillan2006.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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:24:42,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:24:42,324 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:24:42,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:24:42,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:24:42,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:24:42,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:24:42,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:24:42,348 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:24:42,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:24:42,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:24:42,351 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:24:42,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:24:42,353 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:24:42,354 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:24:42,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:24:42,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:24:42,354 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:24:42,354 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:24:42,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:24:42,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:24:42,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:24:42,355 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:24:42,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:24:42,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:24:42,356 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:24:42,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:24:42,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:24:42,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:24:42,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:24:42,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:24:42,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:24:42,359 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 -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:24:42,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:24:42,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:24:42,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:24:42,612 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:24:42,612 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:24:42,613 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-25 10:24:43,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:24:43,994 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:24:43,994 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-25 10:24:43,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/afe46badd/2803c8afa8d1476286c8cfe8ca4268bb/FLAGb927de896 [2024-09-25 10:24:44,008 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/afe46badd/2803c8afa8d1476286c8cfe8ca4268bb [2024-09-25 10:24:44,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:24:44,011 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:24:44,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:24:44,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:24:44,015 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:24:44,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a59c6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44, skipping insertion in model container [2024-09-25 10:24:44,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,029 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:24:44,139 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2024-09-25 10:24:44,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:24:44,165 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:24:44,174 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] [2024-09-25 10:24:44,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:24:44,190 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:24:44,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44 WrapperNode [2024-09-25 10:24:44,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:24:44,191 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:24:44,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:24:44,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:24:44,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,203 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,209 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:24:44,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:24:44,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:24:44,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:24:44,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:24:44,218 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,223 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,237 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-25 10:24:44,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,246 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:24:44,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:24:44,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:24:44,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:24:44,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (1/1) ... [2024-09-25 10:24:44,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:24:44,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:44,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 10:24:44,286 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 10:24:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:24:44,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:24:44,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:24:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:24:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 10:24:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 10:24:44,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 10:24:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:24:44,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:24:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-25 10:24:44,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:24:44,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:24:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 10:24:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 10:24:44,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:24:44,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:24:44,399 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:24:44,402 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:24:44,500 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-25 10:24:44,501 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:24:44,515 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:24:44,519 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:24:44,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:24:44 BoogieIcfgContainer [2024-09-25 10:24:44,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:24:44,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:24:44,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:24:44,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:24:44,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:24:44" (1/3) ... [2024-09-25 10:24:44,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6102b7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:24:44, skipping insertion in model container [2024-09-25 10:24:44,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:24:44" (2/3) ... [2024-09-25 10:24:44,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6102b7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:24:44, skipping insertion in model container [2024-09-25 10:24:44,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:24:44" (3/3) ... [2024-09-25 10:24:44,526 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2024-09-25 10:24:44,537 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:24:44,538 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:24:44,584 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:24:44,589 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;@11d4ce84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:24:44,589 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:24:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:24:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:24:44,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:44,597 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:44,598 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -94361564, now seen corresponding path program 1 times [2024-09-25 10:24:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:44,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710798843] [2024-09-25 10:24:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:44,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:44,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:44,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710798843] [2024-09-25 10:24:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710798843] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:24:44,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:24:44,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:24:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106053436] [2024-09-25 10:24:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:24:44,755 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:24:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:24:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:24:44,774 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:24:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:44,791 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-09-25 10:24:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:24:44,794 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2024-09-25 10:24:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:44,798 INFO L225 Difference]: With dead ends: 37 [2024-09-25 10:24:44,798 INFO L226 Difference]: Without dead ends: 17 [2024-09-25 10:24:44,800 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 [2024-09-25 10:24:44,804 INFO L434 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:44,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:24:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-25 10:24:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-25 10:24:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:24:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-25 10:24:44,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2024-09-25 10:24:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:44,832 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-25 10:24:44,832 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:24:44,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-25 10:24:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:24:44,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:44,834 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:44,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:24:44,835 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:44,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1124416354, now seen corresponding path program 1 times [2024-09-25 10:24:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179550988] [2024-09-25 10:24:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:44,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:44,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179550988] [2024-09-25 10:24:45,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179550988] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:24:45,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:24:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:24:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729429760] [2024-09-25 10:24:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:24:45,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:24:45,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:24:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:24:45,006 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:24:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:45,048 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-09-25 10:24:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:24:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 13 [2024-09-25 10:24:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:45,050 INFO L225 Difference]: With dead ends: 29 [2024-09-25 10:24:45,050 INFO L226 Difference]: Without dead ends: 18 [2024-09-25 10:24:45,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:24:45,051 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:45,051 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:24:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-25 10:24:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-25 10:24:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:24:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-25 10:24:45,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-25 10:24:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:45,061 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-25 10:24:45,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:24:45,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-25 10:24:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:24:45,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:45,063 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:45,063 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:24:45,064 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:45,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1626584132, now seen corresponding path program 1 times [2024-09-25 10:24:45,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:45,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991374751] [2024-09-25 10:24:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:45,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:45,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991374751] [2024-09-25 10:24:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991374751] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844961989] [2024-09-25 10:24:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:45,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:45,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:45,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:45,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:24:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:24:45,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:45,474 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 11 treesize of output 7 [2024-09-25 10:24:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:45,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:45,595 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 14 treesize of output 12 [2024-09-25 10:24:45,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 12 [2024-09-25 10:24:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844961989] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:45,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-25 10:24:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293355420] [2024-09-25 10:24:45,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:45,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:24:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:24:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:24:45,624 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2024-09-25 10:24:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:45,717 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-25 10:24:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:24:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 14 [2024-09-25 10:24:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:45,718 INFO L225 Difference]: With dead ends: 28 [2024-09-25 10:24:45,718 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 10:24:45,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:24:45,720 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:45,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 76 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 10:24:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-09-25 10:24:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:24:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-25 10:24:45,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2024-09-25 10:24:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:45,726 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-25 10:24:45,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2024-09-25 10:24:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-25 10:24:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:24:45,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:45,727 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:45,741 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:24:45,927 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:45,928 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:45,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1746762740, now seen corresponding path program 1 times [2024-09-25 10:24:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:45,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103342209] [2024-09-25 10:24:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 10:24:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103342209] [2024-09-25 10:24:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103342209] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728415946] [2024-09-25 10:24:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:45,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:45,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:24:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:24:46,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:46,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728415946] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:46,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-09-25 10:24:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301567853] [2024-09-25 10:24:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:46,151 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:24:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:24:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:24:46,152 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:46,188 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-25 10:24:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:24:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-09-25 10:24:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:46,190 INFO L225 Difference]: With dead ends: 39 [2024-09-25 10:24:46,190 INFO L226 Difference]: Without dead ends: 25 [2024-09-25 10:24:46,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:24:46,192 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:46,193 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:24:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-25 10:24:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-25 10:24:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:24:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-25 10:24:46,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2024-09-25 10:24:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:46,203 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-25 10:24:46,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:46,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-25 10:24:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 10:24:46,204 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:46,205 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:46,219 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:46,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:46,405 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:46,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1333923114, now seen corresponding path program 2 times [2024-09-25 10:24:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:46,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150565145] [2024-09-25 10:24:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:46,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:24:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150565145] [2024-09-25 10:24:46,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150565145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:46,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024496146] [2024-09-25 10:24:46,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:24:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:46,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:46,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:24:46,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:24:46,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:46,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-25 10:24:46,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:46,652 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 11 treesize of output 7 [2024-09-25 10:24:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:46,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:46,872 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 14 [2024-09-25 10:24:46,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:24:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:24:46,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024496146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:46,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:46,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-25 10:24:46,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635203955] [2024-09-25 10:24:46,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:46,885 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 10:24:46,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 10:24:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:24:46,886 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:47,025 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-25 10:24:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:24:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-25 10:24:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:47,027 INFO L225 Difference]: With dead ends: 36 [2024-09-25 10:24:47,027 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 10:24:47,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:24:47,028 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:47,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 10:24:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-25 10:24:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-09-25 10:24:47,036 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2024-09-25 10:24:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:47,036 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-09-25 10:24:47,036 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:47,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-09-25 10:24:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 10:24:47,037 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:47,037 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:47,050 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:47,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,242 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:47,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -815600930, now seen corresponding path program 3 times [2024-09-25 10:24:47,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:47,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879252050] [2024-09-25 10:24:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:47,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:24:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:24:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:24:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879252050] [2024-09-25 10:24:47,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879252050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:47,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753223197] [2024-09-25 10:24:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:24:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:47,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:47,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:24:47,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:24:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:47,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:24:47,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:24:47,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:24:47,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753223197] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:47,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:47,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-09-25 10:24:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972541416] [2024-09-25 10:24:47,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:47,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:24:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:24:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:24:47,499 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:24:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:47,543 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-09-25 10:24:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:24:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-09-25 10:24:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:47,544 INFO L225 Difference]: With dead ends: 50 [2024-09-25 10:24:47,544 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 10:24:47,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:24:47,545 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:47,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:24:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 10:24:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 10:24:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:24:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-25 10:24:47,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2024-09-25 10:24:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:47,554 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-25 10:24:47,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:24:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-25 10:24:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 10:24:47,555 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:47,556 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:47,570 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 10:24:47,756 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,756 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:47,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2003727868, now seen corresponding path program 4 times [2024-09-25 10:24:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:47,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061419761] [2024-09-25 10:24:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-25 10:24:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:24:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:24:47,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:47,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061419761] [2024-09-25 10:24:47,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061419761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:47,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19945112] [2024-09-25 10:24:47,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:24:47,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:47,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:47,976 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:24:48,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:24:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:48,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 10:24:48,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:48,063 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 11 [2024-09-25 10:24:48,485 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:24:48,486 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 23 treesize of output 10 [2024-09-25 10:24:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:24:48,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:48,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19945112] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:48,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:24:48,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2024-09-25 10:24:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232932471] [2024-09-25 10:24:48,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:48,622 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:24:48,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:24:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:24:48,623 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:24:52,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:24:56,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:24:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:57,110 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2024-09-25 10:24:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:24:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2024-09-25 10:24:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:57,111 INFO L225 Difference]: With dead ends: 64 [2024-09-25 10:24:57,111 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 10:24:57,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:24:57,112 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:57,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-09-25 10:24:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 10:24:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-09-25 10:24:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:24:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-25 10:24:57,118 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2024-09-25 10:24:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:57,118 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-25 10:24:57,119 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:24:57,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-25 10:24:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-25 10:24:57,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:57,120 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:57,133 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:24:57,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-25 10:24:57,321 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:57,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash -868360470, now seen corresponding path program 5 times [2024-09-25 10:24:57,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:57,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881805496] [2024-09-25 10:24:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:57,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:57,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:57,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:24:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:57,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:24:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:57,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:24:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:24:57,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881805496] [2024-09-25 10:24:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881805496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995799580] [2024-09-25 10:24:57,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:24:57,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:57,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:57,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:24:57,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-25 10:24:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:57,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 10:24:57,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:57,655 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 11 treesize of output 7 [2024-09-25 10:24:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:24:57,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:58,027 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 14 [2024-09-25 10:24:58,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:24:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:24:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995799580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:58,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 27 [2024-09-25 10:24:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092086904] [2024-09-25 10:24:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:58,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-25 10:24:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-25 10:24:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:24:58,038 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:24:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:58,230 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-25 10:24:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:24:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 38 [2024-09-25 10:24:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:58,231 INFO L225 Difference]: With dead ends: 52 [2024-09-25 10:24:58,231 INFO L226 Difference]: Without dead ends: 50 [2024-09-25 10:24:58,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:24:58,232 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:58,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 216 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:24:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-25 10:24:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-09-25 10:24:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:24:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-25 10:24:58,239 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2024-09-25 10:24:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:58,239 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-25 10:24:58,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:24:58,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-25 10:24:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-25 10:24:58,240 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:58,240 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:58,253 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:24:58,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:58,441 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:58,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1489740062, now seen corresponding path program 6 times [2024-09-25 10:24:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096004610] [2024-09-25 10:24:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:24:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:24:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:24:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:24:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:58,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096004610] [2024-09-25 10:24:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096004610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800531056] [2024-09-25 10:24:58,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:24:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:58,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:58,573 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:24:58,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-25 10:24:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:24:58,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 10:24:58,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:58,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800531056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:58,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-09-25 10:24:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399899558] [2024-09-25 10:24:58,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:58,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:24:58,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:24:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:24:58,783 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:24:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:24:58,842 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-09-25 10:24:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:24:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2024-09-25 10:24:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:24:58,843 INFO L225 Difference]: With dead ends: 72 [2024-09-25 10:24:58,843 INFO L226 Difference]: Without dead ends: 49 [2024-09-25 10:24:58,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:24:58,843 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:24:58,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:24:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-25 10:24:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-25 10:24:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:24:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-09-25 10:24:58,850 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2024-09-25 10:24:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:24:58,850 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-09-25 10:24:58,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:24:58,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-09-25 10:24:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:24:58,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:24:58,851 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:24:58,866 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 10:24:59,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:59,052 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:24:59,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:24:59,053 INFO L85 PathProgramCache]: Analyzing trace with hash 977875004, now seen corresponding path program 7 times [2024-09-25 10:24:59,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:24:59,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703805989] [2024-09-25 10:24:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:24:59,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:24:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:24:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:24:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:24:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:24:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:24:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:59,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:24:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703805989] [2024-09-25 10:24:59,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703805989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:24:59,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127041249] [2024-09-25 10:24:59,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:24:59,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:24:59,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:24:59,316 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:24:59,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:24:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:24:59,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 10:24:59,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:24:59,452 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 11 treesize of output 7 [2024-09-25 10:24:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:59,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:24:59,924 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 14 [2024-09-25 10:24:59,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:24:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:24:59,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127041249] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:24:59,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:24:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 31 [2024-09-25 10:24:59,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788173696] [2024-09-25 10:24:59,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:24:59,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 10:24:59,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:24:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 10:24:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2024-09-25 10:24:59,938 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:25:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:00,177 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-09-25 10:25:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 10:25:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 46 [2024-09-25 10:25:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:00,179 INFO L225 Difference]: With dead ends: 60 [2024-09-25 10:25:00,179 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 10:25:00,179 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:25:00,180 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:00,180 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 254 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:25:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 10:25:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-25 10:25:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:25:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-25 10:25:00,190 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 46 [2024-09-25 10:25:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:00,191 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-25 10:25:00,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:25:00,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-25 10:25:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-25 10:25:00,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:00,192 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:00,204 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 10:25:00,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:00,393 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:00,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1649176692, now seen corresponding path program 8 times [2024-09-25 10:25:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:00,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936694682] [2024-09-25 10:25:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-25 10:25:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:25:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:25:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:25:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:25:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:25:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936694682] [2024-09-25 10:25:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936694682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352102687] [2024-09-25 10:25:00,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:00,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:00,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:00,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:25:00,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:00,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:00,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:25:00,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:25:00,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:25:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352102687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:00,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-09-25 10:25:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392819962] [2024-09-25 10:25:00,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:00,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:25:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:25:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:25:00,795 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:25:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:00,878 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-25 10:25:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 10:25:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-09-25 10:25:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:00,879 INFO L225 Difference]: With dead ends: 83 [2024-09-25 10:25:00,879 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 10:25:00,879 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:25:00,880 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:00,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 10:25:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-25 10:25:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:25:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-25 10:25:00,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2024-09-25 10:25:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:00,888 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-25 10:25:00,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:25:00,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-25 10:25:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 10:25:00,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:00,889 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:00,903 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:01,090 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 10:25:01,090 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:01,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1278681258, now seen corresponding path program 9 times [2024-09-25 10:25:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403880957] [2024-09-25 10:25:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:25:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:25:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:25:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:25:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:25:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:25:01,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:01,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403880957] [2024-09-25 10:25:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403880957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704832686] [2024-09-25 10:25:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:01,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:01,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:01,362 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:25:01,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:25:01,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:01,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:25:01,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:01,520 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 11 [2024-09-25 10:25:02,356 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:25:02,356 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 23 treesize of output 10 [2024-09-25 10:25:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:25:02,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704832686] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:02,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:25:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-09-25 10:25:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498425433] [2024-09-25 10:25:02,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:02,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:25:02,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:25:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:25:02,497 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:25:06,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:10,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:15,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:19,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:19,388 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2024-09-25 10:25:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-25 10:25:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 54 [2024-09-25 10:25:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:19,389 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:25:19,390 INFO L226 Difference]: Without dead ends: 67 [2024-09-25 10:25:19,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=3299, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 10:25:19,391 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:19,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 273 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 753 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2024-09-25 10:25:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-25 10:25:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-25 10:25:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:25:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-09-25 10:25:19,402 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 54 [2024-09-25 10:25:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:19,402 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-09-25 10:25:19,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:25:19,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-09-25 10:25:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-25 10:25:19,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:19,403 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:19,416 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:25:19,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-25 10:25:19,604 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:19,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1382054524, now seen corresponding path program 10 times [2024-09-25 10:25:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980752332] [2024-09-25 10:25:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:25:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:25:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:25:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:25:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:25:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:25:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:25:19,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:19,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980752332] [2024-09-25 10:25:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980752332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:19,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907804807] [2024-09-25 10:25:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:25:19,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:19,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:19,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:25:20,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:25:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:20,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 10:25:20,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:20,117 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 11 [2024-09-25 10:25:21,130 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:25:21,130 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 23 treesize of output 10 [2024-09-25 10:25:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:25:21,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907804807] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:21,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:25:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2024-09-25 10:25:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768913846] [2024-09-25 10:25:21,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:21,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-25 10:25:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:21,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-25 10:25:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2024-09-25 10:25:21,296 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:25:25,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:29,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:33,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:36,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:37,371 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2024-09-25 10:25:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-25 10:25:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 62 [2024-09-25 10:25:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:37,372 INFO L225 Difference]: With dead ends: 112 [2024-09-25 10:25:37,372 INFO L226 Difference]: Without dead ends: 75 [2024-09-25 10:25:37,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2024-09-25 10:25:37,374 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:37,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 281 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1032 Invalid, 3 Unknown, 0 Unchecked, 15.6s Time] [2024-09-25 10:25:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-25 10:25:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-25 10:25:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:25:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-09-25 10:25:37,393 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2024-09-25 10:25:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:37,393 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-09-25 10:25:37,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:25:37,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-09-25 10:25:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 10:25:37,394 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:37,395 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:37,407 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 10:25:37,595 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 [2024-09-25 10:25:37,595 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:37,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1876307350, now seen corresponding path program 11 times [2024-09-25 10:25:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663603686] [2024-09-25 10:25:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:25:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:25:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663603686] [2024-09-25 10:25:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663603686] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595619959] [2024-09-25 10:25:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:25:37,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:37,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:37,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:25:38,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-25 10:25:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:38,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-25 10:25:38,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:38,177 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 11 treesize of output 7 [2024-09-25 10:25:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:25:38,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:38,942 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 14 [2024-09-25 10:25:38,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:25:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:25:38,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595619959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:38,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:38,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 43 [2024-09-25 10:25:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431350744] [2024-09-25 10:25:38,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:38,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-25 10:25:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-25 10:25:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 10:25:38,955 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:25:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:39,375 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-09-25 10:25:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:25:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2024-09-25 10:25:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:39,376 INFO L225 Difference]: With dead ends: 84 [2024-09-25 10:25:39,376 INFO L226 Difference]: Without dead ends: 82 [2024-09-25 10:25:39,376 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:25:39,377 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:39,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 441 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 10:25:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-25 10:25:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-09-25 10:25:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:25:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-09-25 10:25:39,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 70 [2024-09-25 10:25:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:39,390 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-09-25 10:25:39,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:25:39,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-09-25 10:25:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-25 10:25:39,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:39,391 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:39,404 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 10:25:39,591 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 [2024-09-25 10:25:39,592 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:39,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 346996126, now seen corresponding path program 12 times [2024-09-25 10:25:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:39,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996808353] [2024-09-25 10:25:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 10:25:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:25:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:25:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:25:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:25:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:25:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:25:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:25:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:39,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:39,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996808353] [2024-09-25 10:25:39,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996808353] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:39,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859485725] [2024-09-25 10:25:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:25:39,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:39,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:39,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:25:39,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-25 10:25:39,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:39,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 10:25:39,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:40,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859485725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:40,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-09-25 10:25:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415434328] [2024-09-25 10:25:40,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:40,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 10:25:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 10:25:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:25:40,192 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:25:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:40,289 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-09-25 10:25:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:25:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 77 [2024-09-25 10:25:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:40,290 INFO L225 Difference]: With dead ends: 116 [2024-09-25 10:25:40,290 INFO L226 Difference]: Without dead ends: 81 [2024-09-25 10:25:40,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:25:40,291 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:40,291 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-25 10:25:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-25 10:25:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:25:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-09-25 10:25:40,314 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2024-09-25 10:25:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:40,314 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-09-25 10:25:40,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:25:40,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-09-25 10:25:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-25 10:25:40,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:40,315 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:40,327 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 10:25:40,519 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 [2024-09-25 10:25:40,520 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:40,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash 58217660, now seen corresponding path program 13 times [2024-09-25 10:25:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818809576] [2024-09-25 10:25:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:25:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:40,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818809576] [2024-09-25 10:25:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818809576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:40,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794861225] [2024-09-25 10:25:40,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:25:40,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:40,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:40,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:25:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:40,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-25 10:25:40,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:41,111 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 11 treesize of output 7 [2024-09-25 10:25:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:41,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:41,976 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 14 [2024-09-25 10:25:41,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:25:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-25 10:25:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794861225] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:41,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:41,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 47 [2024-09-25 10:25:41,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493140579] [2024-09-25 10:25:41,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:41,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:25:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:25:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2019, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:25:41,989 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:25:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:42,513 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2024-09-25 10:25:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 10:25:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 78 [2024-09-25 10:25:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:42,514 INFO L225 Difference]: With dead ends: 92 [2024-09-25 10:25:42,514 INFO L226 Difference]: Without dead ends: 90 [2024-09-25 10:25:42,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2024-09-25 10:25:42,515 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:42,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 463 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:25:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-25 10:25:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-09-25 10:25:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:25:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-09-25 10:25:42,533 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 78 [2024-09-25 10:25:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:42,533 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-09-25 10:25:42,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:25:42,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-09-25 10:25:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 10:25:42,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:42,535 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:42,546 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 10:25:42,735 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 [2024-09-25 10:25:42,735 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:42,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1937089780, now seen corresponding path program 14 times [2024-09-25 10:25:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:42,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883437765] [2024-09-25 10:25:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:25:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:25:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:25:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:25:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:25:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:25:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:25:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:25:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:25:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:25:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883437765] [2024-09-25 10:25:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883437765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126136942] [2024-09-25 10:25:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:25:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:42,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:25:43,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:25:43,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:43,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 10:25:43,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:25:43,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:25:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126136942] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:25:43,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:25:43,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-09-25 10:25:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406702889] [2024-09-25 10:25:43,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:43,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:25:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:25:43,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:25:43,375 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:25:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:25:43,467 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2024-09-25 10:25:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:25:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 85 [2024-09-25 10:25:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:25:43,468 INFO L225 Difference]: With dead ends: 127 [2024-09-25 10:25:43,468 INFO L226 Difference]: Without dead ends: 89 [2024-09-25 10:25:43,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 160 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:25:43,469 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:25:43,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:25:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-25 10:25:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-09-25 10:25:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-25 10:25:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2024-09-25 10:25:43,487 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2024-09-25 10:25:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:25:43,487 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2024-09-25 10:25:43,488 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 10:25:43,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2024-09-25 10:25:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 10:25:43,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:25:43,488 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:25:43,501 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-25 10:25:43,689 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 [2024-09-25 10:25:43,689 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:25:43,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:25:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1607595050, now seen corresponding path program 15 times [2024-09-25 10:25:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:25:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018928369] [2024-09-25 10:25:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:25:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:25:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:25:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-25 10:25:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:25:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:25:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:25:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:25:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:25:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:25:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:25:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:25:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:25:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:25:44,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:25:44,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018928369] [2024-09-25 10:25:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018928369] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432820456] [2024-09-25 10:25:44,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:25:44,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:25:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:25:44,140 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:25:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:25:44,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 10:25:44,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:25:44,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:25:44,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:25:44,529 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 11 [2024-09-25 10:25:46,196 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:25:46,197 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 23 treesize of output 10 [2024-09-25 10:25:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 117 proven. 82 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-25 10:25:46,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:25:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432820456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:25:46,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:25:46,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 51 [2024-09-25 10:25:46,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051907512] [2024-09-25 10:25:46,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:25:46,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-25 10:25:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:25:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-25 10:25:46,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2024-09-25 10:25:46,414 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-25 10:25:50,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:55,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:25:59,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:03,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:07,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:12,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:16,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:26:16,430 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2024-09-25 10:26:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-25 10:26:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 86 [2024-09-25 10:26:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:26:16,431 INFO L225 Difference]: With dead ends: 161 [2024-09-25 10:26:16,431 INFO L226 Difference]: Without dead ends: 99 [2024-09-25 10:26:16,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 69 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=643, Invalid=7189, Unknown=0, NotChecked=0, Total=7832 [2024-09-25 10:26:16,433 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 27 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:26:16,433 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 465 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1800 Invalid, 7 Unknown, 0 Unchecked, 29.2s Time] [2024-09-25 10:26:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-25 10:26:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-25 10:26:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:26:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-09-25 10:26:16,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2024-09-25 10:26:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:26:16,455 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-09-25 10:26:16,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-25 10:26:16,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-09-25 10:26:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-25 10:26:16,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:26:16,456 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:26:16,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-25 10:26:16,656 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 [2024-09-25 10:26:16,657 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:26:16,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:26:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1437286660, now seen corresponding path program 16 times [2024-09-25 10:26:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:26:16,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956151955] [2024-09-25 10:26:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:26:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:26:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:26:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-25 10:26:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:26:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-25 10:26:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-25 10:26:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-25 10:26:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:26:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 10:26:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-25 10:26:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-25 10:26:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-25 10:26:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:26:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:26:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:26:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956151955] [2024-09-25 10:26:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956151955] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403748830] [2024-09-25 10:26:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:26:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:26:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:26:17,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:26:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:26:17,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:26:17,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:26:17,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:26:17,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:26:17,483 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 11 [2024-09-25 10:26:19,550 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:26:19,550 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 23 treesize of output 10 [2024-09-25 10:26:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 145 proven. 96 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-25 10:26:19,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:26:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403748830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:26:19,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:26:19,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2024-09-25 10:26:19,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357352474] [2024-09-25 10:26:19,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:26:19,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-25 10:26:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:26:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-25 10:26:19,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2024-09-25 10:26:19,744 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-25 10:26:24,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:28,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:32,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:36,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:40,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:44,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:48,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:53,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:26:57,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:01,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:01,461 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-09-25 10:27:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-25 10:27:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 94 [2024-09-25 10:27:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:01,462 INFO L225 Difference]: With dead ends: 180 [2024-09-25 10:27:01,462 INFO L226 Difference]: Without dead ends: 107 [2024-09-25 10:27:01,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 76 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=726, Invalid=8394, Unknown=0, NotChecked=0, Total=9120 [2024-09-25 10:27:01,464 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 30 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:01,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 304 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1658 Invalid, 10 Unknown, 0 Unchecked, 40.8s Time] [2024-09-25 10:27:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-25 10:27:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-25 10:27:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-25 10:27:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-09-25 10:27:01,484 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2024-09-25 10:27:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:01,485 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-09-25 10:27:01,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-25 10:27:01,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-09-25 10:27:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-25 10:27:01,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:01,486 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:01,500 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:01,687 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 [2024-09-25 10:27:01,687 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:01,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1240172010, now seen corresponding path program 17 times [2024-09-25 10:27:01,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440483947] [2024-09-25 10:27:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:27:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:27:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:27:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:27:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:27:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:27:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:27:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:27:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:27:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:27:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-25 10:27:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:27:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440483947] [2024-09-25 10:27:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440483947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196468491] [2024-09-25 10:27:02,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:27:02,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:02,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:02,215 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:27:02,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 10:27:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:02,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-25 10:27:02,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:02,599 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 11 treesize of output 7 [2024-09-25 10:27:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:27:03,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:03,969 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 14 [2024-09-25 10:27:03,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:27:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-25 10:27:03,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196468491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:03,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:03,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 59 [2024-09-25 10:27:03,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465491519] [2024-09-25 10:27:03,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:03,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-25 10:27:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-25 10:27:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3240, Unknown=0, NotChecked=0, Total=3422 [2024-09-25 10:27:03,987 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:27:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:04,672 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2024-09-25 10:27:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-25 10:27:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 102 [2024-09-25 10:27:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:04,673 INFO L225 Difference]: With dead ends: 116 [2024-09-25 10:27:04,673 INFO L226 Difference]: Without dead ends: 114 [2024-09-25 10:27:04,674 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 178 SyntacticMatches, 23 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=210, Invalid=3696, Unknown=0, NotChecked=0, Total=3906 [2024-09-25 10:27:04,674 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:04,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 598 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:27:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-25 10:27:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-09-25 10:27:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:27:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-09-25 10:27:04,701 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 102 [2024-09-25 10:27:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:04,701 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-09-25 10:27:04,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-25 10:27:04,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-09-25 10:27:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-25 10:27:04,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:04,702 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:04,716 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-25 10:27:04,902 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 [2024-09-25 10:27:04,903 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:04,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1925454366, now seen corresponding path program 18 times [2024-09-25 10:27:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420245149] [2024-09-25 10:27:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:27:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 10:27:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-25 10:27:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:27:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-25 10:27:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-25 10:27:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-25 10:27:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:27:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-25 10:27:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-25 10:27:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-25 10:27:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-25 10:27:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420245149] [2024-09-25 10:27:05,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420245149] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038769846] [2024-09-25 10:27:05,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:27:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:05,269 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:05,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:27:05,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 10:27:05,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:05,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:27:05,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:05,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:06,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038769846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:06,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-09-25 10:27:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902814614] [2024-09-25 10:27:06,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:06,053 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 10:27:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 10:27:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:27:06,054 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:27:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:06,193 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2024-09-25 10:27:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-25 10:27:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 109 [2024-09-25 10:27:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:06,195 INFO L225 Difference]: With dead ends: 160 [2024-09-25 10:27:06,195 INFO L226 Difference]: Without dead ends: 113 [2024-09-25 10:27:06,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 205 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 10:27:06,196 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:06,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-25 10:27:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-09-25 10:27:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:27:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2024-09-25 10:27:06,219 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2024-09-25 10:27:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:06,219 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2024-09-25 10:27:06,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-25 10:27:06,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2024-09-25 10:27:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-25 10:27:06,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:06,220 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:06,234 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:06,420 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 [2024-09-25 10:27:06,420 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:06,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash -54937284, now seen corresponding path program 19 times [2024-09-25 10:27:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:06,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364331374] [2024-09-25 10:27:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:27:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:27:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:27:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:27:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:27:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:27:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:27:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:27:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:27:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:27:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:27:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-25 10:27:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364331374] [2024-09-25 10:27:07,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364331374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216342861] [2024-09-25 10:27:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:27:07,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:07,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:07,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:27:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:07,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 10:27:07,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:07,232 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 11 treesize of output 7 [2024-09-25 10:27:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:07,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:08,245 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 14 [2024-09-25 10:27:08,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:27:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-25 10:27:08,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216342861] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:08,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:08,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 62 [2024-09-25 10:27:08,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411710815] [2024-09-25 10:27:08,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:08,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-25 10:27:08,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-25 10:27:08,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3592, Unknown=0, NotChecked=0, Total=3782 [2024-09-25 10:27:08,517 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-25 10:27:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:09,425 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2024-09-25 10:27:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-25 10:27:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) Word has length 110 [2024-09-25 10:27:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:09,428 INFO L225 Difference]: With dead ends: 124 [2024-09-25 10:27:09,428 INFO L226 Difference]: Without dead ends: 122 [2024-09-25 10:27:09,428 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 193 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=218, Invalid=4072, Unknown=0, NotChecked=0, Total=4290 [2024-09-25 10:27:09,429 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:09,429 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 672 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 10:27:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-25 10:27:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-09-25 10:27:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:27:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-09-25 10:27:09,458 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 110 [2024-09-25 10:27:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:09,459 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-09-25 10:27:09,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-25 10:27:09,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-09-25 10:27:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-25 10:27:09,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:09,459 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:09,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:09,663 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 [2024-09-25 10:27:09,663 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1102649716, now seen corresponding path program 20 times [2024-09-25 10:27:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491464449] [2024-09-25 10:27:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-25 10:27:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-25 10:27:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:27:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-25 10:27:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:27:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 10:27:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-25 10:27:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-25 10:27:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-25 10:27:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 10:27:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:27:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-25 10:27:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-25 10:27:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:27:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491464449] [2024-09-25 10:27:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491464449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883823846] [2024-09-25 10:27:10,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:27:10,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:10,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:10,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:27:10,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:27:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:10,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 10:27:10,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:27:10,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:27:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883823846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:27:10,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:27:10,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2024-09-25 10:27:10,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379883374] [2024-09-25 10:27:10,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:10,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-25 10:27:10,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-25 10:27:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:27:10,767 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:27:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:27:10,941 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2024-09-25 10:27:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:27:10,941 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 117 [2024-09-25 10:27:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:27:10,942 INFO L225 Difference]: With dead ends: 171 [2024-09-25 10:27:10,942 INFO L226 Difference]: Without dead ends: 121 [2024-09-25 10:27:10,943 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 27 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-25 10:27:10,943 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:27:10,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 431 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:27:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-25 10:27:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-25 10:27:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 10:27:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2024-09-25 10:27:10,968 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2024-09-25 10:27:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:27:10,968 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2024-09-25 10:27:10,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-25 10:27:10,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2024-09-25 10:27:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-25 10:27:10,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:27:10,969 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:27:10,982 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-25 10:27:11,170 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 [2024-09-25 10:27:11,170 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:27:11,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:27:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1681033130, now seen corresponding path program 21 times [2024-09-25 10:27:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:27:11,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850126365] [2024-09-25 10:27:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:27:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:27:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:27:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 10:27:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-25 10:27:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-25 10:27:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-25 10:27:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 10:27:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-25 10:27:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:27:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-25 10:27:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 10:27:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-25 10:27:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-25 10:27:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-25 10:27:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-25 10:27:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:27:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:27:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:27:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850126365] [2024-09-25 10:27:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850126365] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212362312] [2024-09-25 10:27:11,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:27:11,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:27:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:27:11,778 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:27:11,780 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:27:12,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-25 10:27:12,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:27:12,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 10:27:12,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:27:12,801 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 11 [2024-09-25 10:27:15,679 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:27:15,679 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 23 treesize of output 10 [2024-09-25 10:27:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-25 10:27:15,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:27:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212362312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:27:15,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:27:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 67 [2024-09-25 10:27:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979993574] [2024-09-25 10:27:15,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:27:15,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-25 10:27:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:27:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-25 10:27:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4218, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:27:15,911 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-25 10:27:20,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:24,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:28,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:32,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:36,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:41,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:45,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:49,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:53,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:27:57,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:01,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:05,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:09,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:28:09,962 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2024-09-25 10:28:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-25 10:28:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 118 [2024-09-25 10:28:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:28:09,964 INFO L225 Difference]: With dead ends: 229 [2024-09-25 10:28:09,964 INFO L226 Difference]: Without dead ends: 131 [2024-09-25 10:28:09,965 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 93 SyntacticMatches, 27 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1012, Invalid=12794, Unknown=0, NotChecked=0, Total=13806 [2024-09-25 10:28:09,965 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 36 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:28:09,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 336 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1900 Invalid, 13 Unknown, 0 Unchecked, 52.8s Time] [2024-09-25 10:28:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-25 10:28:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-25 10:28:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:28:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2024-09-25 10:28:09,997 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 118 [2024-09-25 10:28:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:28:09,998 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2024-09-25 10:28:09,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-25 10:28:09,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2024-09-25 10:28:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-25 10:28:09,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:28:09,999 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:28:10,013 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-25 10:28:10,199 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 [2024-09-25 10:28:10,199 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:28:10,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:28:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1231766396, now seen corresponding path program 22 times [2024-09-25 10:28:10,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:28:10,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020599701] [2024-09-25 10:28:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:28:10,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:28:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:28:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:28:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:28:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-25 10:28:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:28:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-25 10:28:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-25 10:28:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-25 10:28:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-25 10:28:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:28:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:28:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-25 10:28:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-25 10:28:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-25 10:28:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-25 10:28:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:28:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:28:10,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:28:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020599701] [2024-09-25 10:28:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020599701] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558932784] [2024-09-25 10:28:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:28:10,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:28:10,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:28:10,849 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:28:10,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:28:11,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:28:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:28:11,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 10:28:11,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:28:11,640 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 11 [2024-09-25 10:28:15,054 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-25 10:28:15,054 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 23 treesize of output 10 [2024-09-25 10:28:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 287 proven. 162 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-25 10:28:15,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:28:15,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558932784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:28:15,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:28:15,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 71 [2024-09-25 10:28:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556391939] [2024-09-25 10:28:15,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:28:15,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-25 10:28:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:28:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-25 10:28:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=4728, Unknown=0, NotChecked=0, Total=5256 [2024-09-25 10:28:15,316 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-25 10:28:20,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:24,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:28,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:32,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:36,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:40,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:44,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:48,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:52,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:28:57,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:29:01,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:29:05,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:29:09,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 10:29:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:09,835 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2024-09-25 10:29:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-25 10:29:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 126 [2024-09-25 10:29:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:09,837 INFO L225 Difference]: With dead ends: 240 [2024-09-25 10:29:09,837 INFO L226 Difference]: Without dead ends: 139 [2024-09-25 10:29:09,838 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 99 SyntacticMatches, 29 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1108, Invalid=14144, Unknown=0, NotChecked=0, Total=15252 [2024-09-25 10:29:09,838 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 39 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:09,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 431 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2436 Invalid, 13 Unknown, 0 Unchecked, 53.1s Time] [2024-09-25 10:29:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-25 10:29:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-09-25 10:29:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-25 10:29:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2024-09-25 10:29:09,885 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2024-09-25 10:29:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:09,885 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2024-09-25 10:29:09,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-25 10:29:09,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2024-09-25 10:29:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-25 10:29:09,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:09,886 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:09,901 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-25 10:29:10,087 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 [2024-09-25 10:29:10,087 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:10,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash 191035754, now seen corresponding path program 23 times [2024-09-25 10:29:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624762150] [2024-09-25 10:29:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:10,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:29:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:29:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:29:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:29:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:29:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:29:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:29:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:29:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:29:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:29:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:29:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:29:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:29:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-25 10:29:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-25 10:29:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:29:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624762150] [2024-09-25 10:29:10,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624762150] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743663919] [2024-09-25 10:29:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:29:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:10,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 10:29:11,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-25 10:29:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:29:11,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-25 10:29:11,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:11,484 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 11 treesize of output 7 [2024-09-25 10:29:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:29:13,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:29:13,653 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 14 [2024-09-25 10:29:13,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2024-09-25 10:29:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-25 10:29:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743663919] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:29:13,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:29:13,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 38] total 75 [2024-09-25 10:29:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127314100] [2024-09-25 10:29:13,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:29:13,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-25 10:29:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:29:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-25 10:29:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5316, Unknown=0, NotChecked=0, Total=5550 [2024-09-25 10:29:13,671 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:29:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:14,839 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-25 10:29:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-25 10:29:14,840 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 134 [2024-09-25 10:29:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:14,841 INFO L225 Difference]: With dead ends: 148 [2024-09-25 10:29:14,841 INFO L226 Difference]: Without dead ends: 146 [2024-09-25 10:29:14,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 234 SyntacticMatches, 31 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=5900, Unknown=0, NotChecked=0, Total=6162 [2024-09-25 10:29:14,842 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:14,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 965 Invalid, 3979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 10:29:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-25 10:29:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-09-25 10:29:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 107 states have internal predecessors, (108), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:29:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-09-25 10:29:14,876 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2024-09-25 10:29:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:14,876 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-09-25 10:29:14,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:29:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-09-25 10:29:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-09-25 10:29:14,877 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:14,878 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:14,892 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-25 10:29:15,078 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 [2024-09-25 10:29:15,079 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:15,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2060732770, now seen corresponding path program 24 times [2024-09-25 10:29:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:15,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74628400] [2024-09-25 10:29:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-25 10:29:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:29:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-25 10:29:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-25 10:29:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-25 10:29:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:29:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 10:29:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 10:29:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 10:29:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-25 10:29:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-25 10:29:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:29:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-25 10:29:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-25 10:29:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-25 10:29:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-25 10:29:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 378 proven. 182 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:29:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74628400] [2024-09-25 10:29:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74628400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491150489] [2024-09-25 10:29:15,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:29:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:15,587 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 10:29:15,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-09-25 10:29:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:29:15,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 10:29:15,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:29:16,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:29:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 424 proven. 136 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:29:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491150489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:29:16,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:29:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2024-09-25 10:29:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717745737] [2024-09-25 10:29:16,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:29:16,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-25 10:29:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:29:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-25 10:29:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:29:16,718 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-25 10:29:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:29:16,928 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2024-09-25 10:29:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-25 10:29:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 141 [2024-09-25 10:29:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:29:16,929 INFO L225 Difference]: With dead ends: 204 [2024-09-25 10:29:16,929 INFO L226 Difference]: Without dead ends: 145 [2024-09-25 10:29:16,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 265 SyntacticMatches, 33 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2024-09-25 10:29:16,930 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:29:16,930 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 323 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:29:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-25 10:29:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-09-25 10:29:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:29:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2024-09-25 10:29:16,983 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2024-09-25 10:29:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:29:16,983 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2024-09-25 10:29:16,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 35 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-25 10:29:16,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2024-09-25 10:29:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-25 10:29:16,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:29:16,984 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:29:16,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-25 10:29:17,185 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 [2024-09-25 10:29:17,185 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:29:17,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:29:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1204986436, now seen corresponding path program 25 times [2024-09-25 10:29:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:29:17,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678203387] [2024-09-25 10:29:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:29:17,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:29:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:29:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:29:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:29:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:29:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-25 10:29:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-25 10:29:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-25 10:29:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-25 10:29:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:29:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-25 10:29:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-25 10:29:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-25 10:29:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-25 10:29:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-25 10:29:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-25 10:29:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-25 10:29:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-25 10:29:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-25 10:29:18,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:29:18,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678203387] [2024-09-25 10:29:18,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678203387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:29:18,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138016440] [2024-09-25 10:29:18,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:29:18,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:29:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:29:18,112 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:29:18,117 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 10:29:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:29:18,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-25 10:29:18,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:29:18,654 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 11 treesize of output 7