./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c 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/loops-crafted-1/theatreSquare.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:29:31,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:29:31,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:29:31,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:29:31,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:29:31,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:29:31,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:29:31,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:29:31,309 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:29:31,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:29:31,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:29:31,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:29:31,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:29:31,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:29:31,314 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:29:31,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:29:31,315 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:29:31,315 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:29:31,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:29:31,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:29:31,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:29:31,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:29:31,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:29:31,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:29:31,319 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:29:31,319 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:29:31,320 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:29:31,320 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:29:31,320 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:29:31,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:29:31,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:29:31,321 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:29:31,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:29:31,321 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:29:31,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:29:31,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:29:31,322 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:29:31,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:29:31,322 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:29:31,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:29:31,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:29:31,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:29:31,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:29:31,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:29:31,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:29:31,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:29:31,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:29:31,598 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:29:31,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-10-15 14:29:32,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:29:33,151 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:29:33,152 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-10-15 14:29:33,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6d09ab3de/d61c6411ebcd4743b022f55210862a93/FLAGb529625c7 [2024-10-15 14:29:33,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6d09ab3de/d61c6411ebcd4743b022f55210862a93 [2024-10-15 14:29:33,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:29:33,181 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:29:33,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:29:33,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:29:33,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:29:33,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba2717f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33, skipping insertion in model container [2024-10-15 14:29:33,192 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,215 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:29:33,379 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2024-10-15 14:29:33,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:29:33,416 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:29:33,427 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2024-10-15 14:29:33,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:29:33,460 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:29:33,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33 WrapperNode [2024-10-15 14:29:33,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:29:33,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:29:33,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:29:33,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:29:33,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,484 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:29:33,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:29:33,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:29:33,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:29:33,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:29:33,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,498 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,511 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-15 14:29:33,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:29:33,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:29:33,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:29:33,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:29:33,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (1/1) ... [2024-10-15 14:29:33,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:29:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:33,562 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) [2024-10-15 14:29:33,565 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 [2024-10-15 14:29:33,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:29:33,613 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-10-15 14:29:33,613 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-10-15 14:29:33,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:29:33,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:29:33,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:29:33,614 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-10-15 14:29:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-10-15 14:29:33,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:29:33,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:29:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:29:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:29:33,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:29:33,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:29:33,688 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:29:33,690 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:29:33,945 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-15 14:29:33,946 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:29:33,962 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:29:33,963 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-15 14:29:33,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:29:33 BoogieIcfgContainer [2024-10-15 14:29:33,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:29:33,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:29:33,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:29:33,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:29:33,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:29:33" (1/3) ... [2024-10-15 14:29:33,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59258517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:29:33, skipping insertion in model container [2024-10-15 14:29:33,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:29:33" (2/3) ... [2024-10-15 14:29:33,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59258517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:29:33, skipping insertion in model container [2024-10-15 14:29:33,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:29:33" (3/3) ... [2024-10-15 14:29:33,971 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2024-10-15 14:29:33,985 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:29:33,985 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:29:34,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:29:34,032 INFO L333 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;@314d57a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:29:34,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:29:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 14:29:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-15 14:29:34,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:34,041 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:34,042 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:34,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1398085946, now seen corresponding path program 1 times [2024-10-15 14:29:34,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:34,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135584725] [2024-10-15 14:29:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:34,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:29:34,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:34,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135584725] [2024-10-15 14:29:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135584725] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:34,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:34,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:34,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915265901] [2024-10-15 14:29:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:34,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:34,344 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-10-15 14:29:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:34,420 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2024-10-15 14:29:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 10 [2024-10-15 14:29:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:34,428 INFO L225 Difference]: With dead ends: 68 [2024-10-15 14:29:34,428 INFO L226 Difference]: Without dead ends: 29 [2024-10-15 14:29:34,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:29:34,435 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:34,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-15 14:29:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-15 14:29:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-10-15 14:29:34,475 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2024-10-15 14:29:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:34,476 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-10-15 14:29:34,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2024-10-15 14:29:34,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-10-15 14:29:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-15 14:29:34,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:34,479 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:34,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:29:34,480 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:34,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1021222372, now seen corresponding path program 1 times [2024-10-15 14:29:34,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:34,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724399044] [2024-10-15 14:29:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:34,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,774 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 14:29:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:29:34,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724399044] [2024-10-15 14:29:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724399044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:34,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:34,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-15 14:29:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281259764] [2024-10-15 14:29:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:34,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:29:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:34,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:29:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:29:34,937 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,070 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-10-15 14:29:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 14:29:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-10-15 14:29:35,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,074 INFO L225 Difference]: With dead ends: 45 [2024-10-15 14:29:35,074 INFO L226 Difference]: Without dead ends: 39 [2024-10-15 14:29:35,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:29:35,076 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-15 14:29:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-10-15 14:29:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-15 14:29:35,093 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 28 [2024-10-15 14:29:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,094 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-15 14:29:35,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-15 14:29:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 14:29:35,097 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:29:35,097 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1777130061, now seen corresponding path program 1 times [2024-10-15 14:29:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426887155] [2024-10-15 14:29:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:29:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:29:35,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426887155] [2024-10-15 14:29:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426887155] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-15 14:29:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626412931] [2024-10-15 14:29:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 14:29:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 14:29:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 14:29:35,175 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,233 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-15 14:29:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:29:35,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-15 14:29:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,236 INFO L225 Difference]: With dead ends: 62 [2024-10-15 14:29:35,237 INFO L226 Difference]: Without dead ends: 41 [2024-10-15 14:29:35,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,238 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-15 14:29:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-15 14:29:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-10-15 14:29:35,252 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 29 [2024-10-15 14:29:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,253 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-10-15 14:29:35,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-10-15 14:29:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-15 14:29:35,254 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,254 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 14:29:35,254 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash -464096742, now seen corresponding path program 1 times [2024-10-15 14:29:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597996326] [2024-10-15 14:29:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 14:29:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:29:35,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597996326] [2024-10-15 14:29:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597996326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-15 14:29:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322343523] [2024-10-15 14:29:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-15 14:29:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-15 14:29:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-15 14:29:35,327 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,351 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-10-15 14:29:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-15 14:29:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-10-15 14:29:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,352 INFO L225 Difference]: With dead ends: 54 [2024-10-15 14:29:35,352 INFO L226 Difference]: Without dead ends: 45 [2024-10-15 14:29:35,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,354 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-15 14:29:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-15 14:29:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2024-10-15 14:29:35,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2024-10-15 14:29:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,367 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2024-10-15 14:29:35,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:35,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2024-10-15 14:29:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 14:29:35,369 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,369 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-15 14:29:35,369 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1580607788, now seen corresponding path program 1 times [2024-10-15 14:29:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677343458] [2024-10-15 14:29:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-15 14:29:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677343458] [2024-10-15 14:29:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677343458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737833842] [2024-10-15 14:29:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:35,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,480 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,511 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-10-15 14:29:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-10-15 14:29:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,513 INFO L225 Difference]: With dead ends: 69 [2024-10-15 14:29:35,513 INFO L226 Difference]: Without dead ends: 42 [2024-10-15 14:29:35,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,515 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-15 14:29:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-15 14:29:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-10-15 14:29:35,529 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2024-10-15 14:29:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,530 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-10-15 14:29:35,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:35,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-10-15 14:29:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 14:29:35,531 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,531 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-15 14:29:35,532 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -83212372, now seen corresponding path program 1 times [2024-10-15 14:29:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935396394] [2024-10-15 14:29:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:29:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:35,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935396394] [2024-10-15 14:29:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935396394] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148717390] [2024-10-15 14:29:35,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,636 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,660 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-10-15 14:29:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:35,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-10-15 14:29:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,662 INFO L225 Difference]: With dead ends: 74 [2024-10-15 14:29:35,662 INFO L226 Difference]: Without dead ends: 43 [2024-10-15 14:29:35,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,663 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-15 14:29:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-15 14:29:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-10-15 14:29:35,670 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2024-10-15 14:29:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,670 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-10-15 14:29:35,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:35,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-10-15 14:29:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 14:29:35,672 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,672 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-15 14:29:35,674 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash -877631710, now seen corresponding path program 1 times [2024-10-15 14:29:35,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568829753] [2024-10-15 14:29:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-15 14:29:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568829753] [2024-10-15 14:29:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568829753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82429166] [2024-10-15 14:29:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,754 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,783 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-10-15 14:29:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-15 14:29:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,785 INFO L225 Difference]: With dead ends: 60 [2024-10-15 14:29:35,785 INFO L226 Difference]: Without dead ends: 45 [2024-10-15 14:29:35,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,786 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-15 14:29:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-15 14:29:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-10-15 14:29:35,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 31 [2024-10-15 14:29:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,800 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-10-15 14:29:35,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-10-15 14:29:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:29:35,802 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,802 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-15 14:29:35,802 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 659613075, now seen corresponding path program 1 times [2024-10-15 14:29:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325089592] [2024-10-15 14:29:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:35,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325089592] [2024-10-15 14:29:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325089592] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:35,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184498038] [2024-10-15 14:29:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:35,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:35,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,905 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:35,927 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-15 14:29:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-15 14:29:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:35,928 INFO L225 Difference]: With dead ends: 53 [2024-10-15 14:29:35,928 INFO L226 Difference]: Without dead ends: 41 [2024-10-15 14:29:35,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:35,929 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:35,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-15 14:29:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-15 14:29:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-15 14:29:35,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2024-10-15 14:29:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:35,937 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-15 14:29:35,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:35,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-15 14:29:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:29:35,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:35,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:35,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-15 14:29:35,939 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:35,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1195320207, now seen corresponding path program 1 times [2024-10-15 14:29:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:35,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058790726] [2024-10-15 14:29:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:35,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:35,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:36,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058790726] [2024-10-15 14:29:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058790726] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:36,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313802378] [2024-10-15 14:29:36,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:36,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:36,015 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:36,041 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-10-15 14:29:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-10-15 14:29:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:36,043 INFO L225 Difference]: With dead ends: 47 [2024-10-15 14:29:36,043 INFO L226 Difference]: Without dead ends: 39 [2024-10-15 14:29:36,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:29:36,044 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:36,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-15 14:29:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-10-15 14:29:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-10-15 14:29:36,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2024-10-15 14:29:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:36,050 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-10-15 14:29:36,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:36,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-10-15 14:29:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:29:36,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:36,051 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:36,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-15 14:29:36,051 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:36,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -358658342, now seen corresponding path program 1 times [2024-10-15 14:29:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:36,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639149092] [2024-10-15 14:29:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,081 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,086 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 14:29:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639149092] [2024-10-15 14:29:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639149092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:29:36,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:29:36,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:29:36,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278212317] [2024-10-15 14:29:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:29:36,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:29:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:29:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:29:36,139 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:36,169 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-10-15 14:29:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:29:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-10-15 14:29:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:36,172 INFO L225 Difference]: With dead ends: 55 [2024-10-15 14:29:36,172 INFO L226 Difference]: Without dead ends: 35 [2024-10-15 14:29:36,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:29:36,173 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:36,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-15 14:29:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-15 14:29:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:29:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-10-15 14:29:36,180 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2024-10-15 14:29:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:36,180 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-10-15 14:29:36,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:36,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-10-15 14:29:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 14:29:36,182 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:36,182 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:36,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-15 14:29:36,182 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:36,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1566162331, now seen corresponding path program 1 times [2024-10-15 14:29:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:36,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521536861] [2024-10-15 14:29:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:36,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:36,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521536861] [2024-10-15 14:29:36,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521536861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:36,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764378777] [2024-10-15 14:29:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:36,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:36,575 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) [2024-10-15 14:29:36,577 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:29:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:36,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-15 14:29:36,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:36,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:37,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764378777] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:37,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 24 [2024-10-15 14:29:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185537876] [2024-10-15 14:29:37,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:37,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:29:37,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:29:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:29:37,067 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:37,312 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-10-15 14:29:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 14:29:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-15 14:29:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:37,315 INFO L225 Difference]: With dead ends: 63 [2024-10-15 14:29:37,315 INFO L226 Difference]: Without dead ends: 57 [2024-10-15 14:29:37,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:29:37,316 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:37,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 496 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-15 14:29:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-10-15 14:29:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-15 14:29:37,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2024-10-15 14:29:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:37,330 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-15 14:29:37,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:37,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-15 14:29:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-15 14:29:37,334 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:37,335 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:37,354 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:37,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 14:29:37,536 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:37,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash -344080326, now seen corresponding path program 2 times [2024-10-15 14:29:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:37,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415887117] [2024-10-15 14:29:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:37,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:37,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:37,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:29:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:37,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:37,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415887117] [2024-10-15 14:29:37,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415887117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:37,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254036981] [2024-10-15 14:29:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:29:37,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:37,605 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) [2024-10-15 14:29:37,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:29:37,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:37,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:37,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-15 14:29:37,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:37,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:37,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254036981] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:37,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:37,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-15 14:29:37,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335637053] [2024-10-15 14:29:37,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:37,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:29:37,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:29:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:29:37,737 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:37,767 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-10-15 14:29:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:29:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-10-15 14:29:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:37,769 INFO L225 Difference]: With dead ends: 86 [2024-10-15 14:29:37,769 INFO L226 Difference]: Without dead ends: 59 [2024-10-15 14:29:37,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:29:37,771 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:37,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-15 14:29:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-15 14:29:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-10-15 14:29:37,788 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 35 [2024-10-15 14:29:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:37,788 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-10-15 14:29:37,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:37,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-10-15 14:29:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-15 14:29:37,789 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:37,789 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:37,806 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:37,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-15 14:29:37,990 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:37,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash -177366287, now seen corresponding path program 3 times [2024-10-15 14:29:37,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:37,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213218465] [2024-10-15 14:29:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,023 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213218465] [2024-10-15 14:29:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213218465] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266304588] [2024-10-15 14:29:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:29:38,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:38,062 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) [2024-10-15 14:29:38,063 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:29:38,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-15 14:29:38,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:38,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-15 14:29:38,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:38,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:38,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266304588] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:38,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:38,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-15 14:29:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027849952] [2024-10-15 14:29:38,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:38,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:29:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:29:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:29:38,208 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:38,244 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-10-15 14:29:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:29:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-15 14:29:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:38,245 INFO L225 Difference]: With dead ends: 78 [2024-10-15 14:29:38,246 INFO L226 Difference]: Without dead ends: 69 [2024-10-15 14:29:38,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:29:38,247 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:38,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-15 14:29:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-15 14:29:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.280701754385965) internal successors, (73), 59 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-15 14:29:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-15 14:29:38,262 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 35 [2024-10-15 14:29:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:38,263 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-15 14:29:38,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:38,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-15 14:29:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-15 14:29:38,264 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:38,264 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:38,282 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:29:38,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:29:38,465 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:38,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:38,466 INFO L85 PathProgramCache]: Analyzing trace with hash -253773038, now seen corresponding path program 4 times [2024-10-15 14:29:38,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013689667] [2024-10-15 14:29:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:38,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013689667] [2024-10-15 14:29:38,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013689667] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:38,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531882900] [2024-10-15 14:29:38,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:29:38,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:38,684 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) [2024-10-15 14:29:38,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:29:38,730 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:29:38,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:38,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:29:38,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:38,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:39,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531882900] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:39,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:39,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-15 14:29:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44978641] [2024-10-15 14:29:39,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:39,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:29:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:29:39,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:29:39,148 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:39,295 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-10-15 14:29:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-15 14:29:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:39,297 INFO L225 Difference]: With dead ends: 85 [2024-10-15 14:29:39,297 INFO L226 Difference]: Without dead ends: 79 [2024-10-15 14:29:39,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:29:39,299 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:39,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-15 14:29:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-10-15 14:29:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-15 14:29:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-10-15 14:29:39,310 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 35 [2024-10-15 14:29:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:39,310 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-10-15 14:29:39,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:39,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-10-15 14:29:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-15 14:29:39,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:39,311 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:39,329 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 14:29:39,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:39,512 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:39,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891291, now seen corresponding path program 5 times [2024-10-15 14:29:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057247749] [2024-10-15 14:29:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:39,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:39,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:39,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:29:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:39,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057247749] [2024-10-15 14:29:39,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057247749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:39,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131285165] [2024-10-15 14:29:39,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:29:39,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:39,699 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) [2024-10-15 14:29:39,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:29:39,757 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:39,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:39,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:29:39,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:39,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131285165] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:40,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:40,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-10-15 14:29:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246764581] [2024-10-15 14:29:40,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:40,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:29:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:29:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:29:40,121 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:40,249 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-10-15 14:29:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-15 14:29:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:40,250 INFO L225 Difference]: With dead ends: 85 [2024-10-15 14:29:40,251 INFO L226 Difference]: Without dead ends: 79 [2024-10-15 14:29:40,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:29:40,251 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:40,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 273 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-15 14:29:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-10-15 14:29:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-15 14:29:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-10-15 14:29:40,264 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 35 [2024-10-15 14:29:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:40,264 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-10-15 14:29:40,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:40,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-10-15 14:29:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:29:40,266 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:40,266 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:40,282 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:29:40,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:29:40,471 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:40,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1445540013, now seen corresponding path program 6 times [2024-10-15 14:29:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604360109] [2024-10-15 14:29:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:40,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:40,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:40,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:40,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-15 14:29:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604360109] [2024-10-15 14:29:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604360109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882176764] [2024-10-15 14:29:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:29:40,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:40,729 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) [2024-10-15 14:29:40,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:29:40,779 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-15 14:29:40,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:40,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:29:40,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:40,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882176764] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:41,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:41,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-10-15 14:29:41,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994280090] [2024-10-15 14:29:41,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:41,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:29:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:29:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:29:41,130 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:41,294 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-10-15 14:29:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:41,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-10-15 14:29:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:41,295 INFO L225 Difference]: With dead ends: 97 [2024-10-15 14:29:41,295 INFO L226 Difference]: Without dead ends: 84 [2024-10-15 14:29:41,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:29:41,298 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:41,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 413 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-15 14:29:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-10-15 14:29:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 68 states have internal predecessors, (79), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-15 14:29:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-10-15 14:29:41,312 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 36 [2024-10-15 14:29:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:41,312 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-10-15 14:29:41,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:41,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-10-15 14:29:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:29:41,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:41,313 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:41,330 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:29:41,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:29:41,514 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:41,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1200674140, now seen corresponding path program 7 times [2024-10-15 14:29:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124712400] [2024-10-15 14:29:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:41,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:41,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:41,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:41,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:29:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124712400] [2024-10-15 14:29:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124712400] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:41,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829854854] [2024-10-15 14:29:41,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:29:41,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:41,862 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) [2024-10-15 14:29:41,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:29:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:41,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-15 14:29:41,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:42,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:42,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829854854] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:42,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2024-10-15 14:29:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240151633] [2024-10-15 14:29:42,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:42,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:29:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:29:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:29:42,206 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:42,505 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2024-10-15 14:29:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:29:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-10-15 14:29:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:42,506 INFO L225 Difference]: With dead ends: 122 [2024-10-15 14:29:42,506 INFO L226 Difference]: Without dead ends: 116 [2024-10-15 14:29:42,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:29:42,508 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:42,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 623 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-15 14:29:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2024-10-15 14:29:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 94 states have internal predecessors, (107), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-10-15 14:29:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2024-10-15 14:29:42,524 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 36 [2024-10-15 14:29:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:42,524 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2024-10-15 14:29:42,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:42,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2024-10-15 14:29:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:29:42,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:42,525 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:42,542 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:42,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:29:42,726 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:42,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:42,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1664629901, now seen corresponding path program 8 times [2024-10-15 14:29:42,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971259767] [2024-10-15 14:29:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:42,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:42,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:42,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971259767] [2024-10-15 14:29:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971259767] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849106946] [2024-10-15 14:29:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:29:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:42,930 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) [2024-10-15 14:29:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:29:42,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:42,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:42,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:29:42,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:43,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:43,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849106946] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:43,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:43,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-10-15 14:29:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714452429] [2024-10-15 14:29:43,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:43,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:29:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:29:43,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:29:43,341 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:43,482 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2024-10-15 14:29:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-10-15 14:29:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:43,483 INFO L225 Difference]: With dead ends: 118 [2024-10-15 14:29:43,483 INFO L226 Difference]: Without dead ends: 107 [2024-10-15 14:29:43,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:29:43,484 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:43,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 371 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-15 14:29:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-10-15 14:29:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.271604938271605) internal successors, (103), 91 states have internal predecessors, (103), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-15 14:29:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2024-10-15 14:29:43,499 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 36 [2024-10-15 14:29:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:43,500 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2024-10-15 14:29:43,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:43,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2024-10-15 14:29:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:29:43,501 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:43,501 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:43,515 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 14:29:43,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:43,702 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:43,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -381188357, now seen corresponding path program 9 times [2024-10-15 14:29:43,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:43,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526986242] [2024-10-15 14:29:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:43,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:43,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:43,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:29:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:43,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526986242] [2024-10-15 14:29:43,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526986242] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123178989] [2024-10-15 14:29:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:29:43,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:43,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:43,931 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) [2024-10-15 14:29:43,933 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:29:43,989 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:29:43,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:43,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:29:43,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:44,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:44,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123178989] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:44,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:44,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-10-15 14:29:44,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957587254] [2024-10-15 14:29:44,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:44,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:29:44,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:29:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:29:44,479 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:44,737 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-10-15 14:29:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:29:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-10-15 14:29:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:44,739 INFO L225 Difference]: With dead ends: 121 [2024-10-15 14:29:44,739 INFO L226 Difference]: Without dead ends: 108 [2024-10-15 14:29:44,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:29:44,740 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:44,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 376 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-15 14:29:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-10-15 14:29:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-15 14:29:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2024-10-15 14:29:44,758 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 37 [2024-10-15 14:29:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:44,758 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2024-10-15 14:29:44,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:44,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2024-10-15 14:29:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:29:44,759 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:44,759 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:44,772 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:29:44,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:44,960 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:44,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -956103598, now seen corresponding path program 10 times [2024-10-15 14:29:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733392244] [2024-10-15 14:29:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:45,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:45,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:45,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733392244] [2024-10-15 14:29:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733392244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708328738] [2024-10-15 14:29:45,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:29:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:45,177 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) [2024-10-15 14:29:45,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:29:45,229 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:29:45,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:45,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:29:45,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:45,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708328738] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:45,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-10-15 14:29:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983413604] [2024-10-15 14:29:45,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:45,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:29:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:29:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:29:45,670 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:45,895 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-10-15 14:29:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:29:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-10-15 14:29:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:45,896 INFO L225 Difference]: With dead ends: 114 [2024-10-15 14:29:45,896 INFO L226 Difference]: Without dead ends: 103 [2024-10-15 14:29:45,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:29:45,897 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:45,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 412 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-15 14:29:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-10-15 14:29:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 87 states have internal predecessors, (99), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 14:29:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2024-10-15 14:29:45,914 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 37 [2024-10-15 14:29:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:45,914 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2024-10-15 14:29:45,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:45,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2024-10-15 14:29:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:29:45,915 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:45,915 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:45,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:46,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:46,116 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:46,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash -503145867, now seen corresponding path program 11 times [2024-10-15 14:29:46,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:46,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994353506] [2024-10-15 14:29:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:46,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994353506] [2024-10-15 14:29:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994353506] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815507122] [2024-10-15 14:29:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:29:46,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:46,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:46,195 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) [2024-10-15 14:29:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:29:46,253 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:46,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:46,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:29:46,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815507122] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:46,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:46,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-10-15 14:29:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494488945] [2024-10-15 14:29:46,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:46,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:29:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:29:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:29:46,326 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:46,373 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-10-15 14:29:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 14:29:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-10-15 14:29:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:46,374 INFO L225 Difference]: With dead ends: 110 [2024-10-15 14:29:46,374 INFO L226 Difference]: Without dead ends: 98 [2024-10-15 14:29:46,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:29:46,375 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:46,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-15 14:29:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-10-15 14:29:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 14:29:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-10-15 14:29:46,390 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 37 [2024-10-15 14:29:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:46,390 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-10-15 14:29:46,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:46,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-10-15 14:29:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:29:46,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:46,392 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:46,408 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:46,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:46,592 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:46,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash 567096122, now seen corresponding path program 12 times [2024-10-15 14:29:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009045335] [2024-10-15 14:29:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-15 14:29:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:46,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009045335] [2024-10-15 14:29:46,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009045335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676184270] [2024-10-15 14:29:46,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:29:46,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:46,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:46,678 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) [2024-10-15 14:29:46,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:29:46,733 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-15 14:29:46,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:46,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:29:46,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:46,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676184270] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:46,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:46,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-10-15 14:29:46,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148835711] [2024-10-15 14:29:46,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:46,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:29:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:29:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:29:46,807 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:46,856 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2024-10-15 14:29:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 14:29:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-10-15 14:29:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:46,859 INFO L225 Difference]: With dead ends: 144 [2024-10-15 14:29:46,859 INFO L226 Difference]: Without dead ends: 91 [2024-10-15 14:29:46,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:29:46,859 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:46,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-15 14:29:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-10-15 14:29:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 79 states have internal predecessors, (91), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 14:29:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-10-15 14:29:46,878 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 37 [2024-10-15 14:29:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:46,878 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-10-15 14:29:46,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:46,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-10-15 14:29:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:29:46,879 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:46,879 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:46,895 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:47,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:29:47,080 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:47,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1478178501, now seen corresponding path program 13 times [2024-10-15 14:29:47,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:47,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621098353] [2024-10-15 14:29:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:47,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:47,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:47,308 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621098353] [2024-10-15 14:29:47,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621098353] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069116874] [2024-10-15 14:29:47,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:29:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:47,445 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) [2024-10-15 14:29:47,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:29:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:47,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:29:47,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:47,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069116874] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:47,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-10-15 14:29:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027812541] [2024-10-15 14:29:47,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:47,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 14:29:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 14:29:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:29:47,780 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:48,087 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2024-10-15 14:29:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:29:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-10-15 14:29:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:48,088 INFO L225 Difference]: With dead ends: 127 [2024-10-15 14:29:48,088 INFO L226 Difference]: Without dead ends: 121 [2024-10-15 14:29:48,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:29:48,089 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:48,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 960 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-15 14:29:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-10-15 14:29:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 92 states have internal predecessors, (104), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-10-15 14:29:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-10-15 14:29:48,106 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 38 [2024-10-15 14:29:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:48,106 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-10-15 14:29:48,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:48,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-10-15 14:29:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:29:48,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:48,107 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:48,124 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-15 14:29:48,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:48,308 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:48,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1583594271, now seen corresponding path program 14 times [2024-10-15 14:29:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:48,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412359571] [2024-10-15 14:29:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:48,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:48,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:48,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:48,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:48,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:48,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412359571] [2024-10-15 14:29:48,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412359571] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:48,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852937871] [2024-10-15 14:29:48,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:29:48,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:48,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:48,641 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) [2024-10-15 14:29:48,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:29:48,702 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:48,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:48,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-15 14:29:48,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:48,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852937871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:49,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 28 [2024-10-15 14:29:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540941699] [2024-10-15 14:29:49,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:49,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 14:29:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 14:29:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:29:49,064 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:49,330 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2024-10-15 14:29:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:29:49,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-10-15 14:29:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:49,331 INFO L225 Difference]: With dead ends: 121 [2024-10-15 14:29:49,331 INFO L226 Difference]: Without dead ends: 115 [2024-10-15 14:29:49,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:29:49,333 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:49,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-15 14:29:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-10-15 14:29:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 14:29:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-10-15 14:29:49,351 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 38 [2024-10-15 14:29:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:49,352 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-10-15 14:29:49,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:49,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-10-15 14:29:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 14:29:49,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:49,353 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:49,364 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:49,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:29:49,553 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:49,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash -368487758, now seen corresponding path program 15 times [2024-10-15 14:29:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:49,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960382843] [2024-10-15 14:29:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:49,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:49,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:49,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:49,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960382843] [2024-10-15 14:29:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960382843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643839485] [2024-10-15 14:29:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:29:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:49,813 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) [2024-10-15 14:29:49,815 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:29:49,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:29:49,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:49,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 14:29:49,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:50,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643839485] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:50,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:50,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-10-15 14:29:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512475501] [2024-10-15 14:29:50,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:50,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 14:29:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 14:29:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:29:50,518 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:50,858 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2024-10-15 14:29:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:29:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-10-15 14:29:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:50,859 INFO L225 Difference]: With dead ends: 137 [2024-10-15 14:29:50,859 INFO L226 Difference]: Without dead ends: 124 [2024-10-15 14:29:50,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:29:50,861 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:50,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 482 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-10-15 14:29:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2024-10-15 14:29:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 102 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 14:29:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2024-10-15 14:29:50,881 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 39 [2024-10-15 14:29:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:50,881 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2024-10-15 14:29:50,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:50,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2024-10-15 14:29:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 14:29:50,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:50,883 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:50,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-15 14:29:51,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:29:51,086 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:51,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1010991045, now seen corresponding path program 16 times [2024-10-15 14:29:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:51,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427551902] [2024-10-15 14:29:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:51,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:51,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:51,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:51,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:29:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:51,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:51,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427551902] [2024-10-15 14:29:51,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427551902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652964176] [2024-10-15 14:29:51,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:29:51,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:51,355 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) [2024-10-15 14:29:51,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:29:51,411 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:29:51,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:51,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 14:29:51,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:51,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:52,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652964176] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:52,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:52,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-10-15 14:29:52,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394894090] [2024-10-15 14:29:52,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:52,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 14:29:52,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 14:29:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:29:52,066 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:52,368 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2024-10-15 14:29:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:29:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-10-15 14:29:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:52,370 INFO L225 Difference]: With dead ends: 130 [2024-10-15 14:29:52,370 INFO L226 Difference]: Without dead ends: 119 [2024-10-15 14:29:52,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:29:52,371 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:52,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 479 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-15 14:29:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-10-15 14:29:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 103 states have internal predecessors, (117), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-15 14:29:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-10-15 14:29:52,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 39 [2024-10-15 14:29:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:52,400 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-10-15 14:29:52,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:52,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-10-15 14:29:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 14:29:52,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:52,402 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:52,417 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-15 14:29:52,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:52,602 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:52,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash 464480282, now seen corresponding path program 17 times [2024-10-15 14:29:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:52,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503526372] [2024-10-15 14:29:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:52,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:52,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:52,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:52,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:29:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:52,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:52,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503526372] [2024-10-15 14:29:52,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503526372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:52,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286147257] [2024-10-15 14:29:52,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:29:52,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:52,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:52,690 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) [2024-10-15 14:29:52,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:29:52,750 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:29:52,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:52,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:29:52,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:52,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286147257] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:52,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:52,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-10-15 14:29:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830476449] [2024-10-15 14:29:52,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:52,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:29:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:29:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:29:52,836 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:52,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:52,914 INFO L93 Difference]: Finished difference Result 211 states and 258 transitions. [2024-10-15 14:29:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-10-15 14:29:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:52,939 INFO L225 Difference]: With dead ends: 211 [2024-10-15 14:29:52,939 INFO L226 Difference]: Without dead ends: 139 [2024-10-15 14:29:52,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:29:52,943 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:52,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-15 14:29:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-10-15 14:29:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 125 states have internal predecessors, (144), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-15 14:29:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2024-10-15 14:29:52,974 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2024-10-15 14:29:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:52,974 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2024-10-15 14:29:52,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:52,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2024-10-15 14:29:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-15 14:29:52,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:52,976 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:52,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:53,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:29:53,177 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:53,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash -717756427, now seen corresponding path program 18 times [2024-10-15 14:29:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:53,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104036516] [2024-10-15 14:29:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104036516] [2024-10-15 14:29:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104036516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143503322] [2024-10-15 14:29:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:29:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:53,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:53,253 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) [2024-10-15 14:29:53,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:29:53,311 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-15 14:29:53,311 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:53,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:29:53,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:53,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 14:29:53,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143503322] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:53,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:53,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-10-15 14:29:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412895256] [2024-10-15 14:29:53,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:53,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:29:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:53,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:29:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:29:53,390 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:53,441 INFO L93 Difference]: Finished difference Result 179 states and 221 transitions. [2024-10-15 14:29:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 14:29:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-10-15 14:29:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:53,442 INFO L225 Difference]: With dead ends: 179 [2024-10-15 14:29:53,442 INFO L226 Difference]: Without dead ends: 161 [2024-10-15 14:29:53,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:29:53,443 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:53,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:29:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-15 14:29:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-10-15 14:29:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 147 states have internal predecessors, (171), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-15 14:29:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2024-10-15 14:29:53,476 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 39 [2024-10-15 14:29:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:53,477 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2024-10-15 14:29:53,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:29:53,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2024-10-15 14:29:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 14:29:53,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:53,478 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:53,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-15 14:29:53,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-15 14:29:53,679 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:53,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:53,679 INFO L85 PathProgramCache]: Analyzing trace with hash -223332356, now seen corresponding path program 19 times [2024-10-15 14:29:53,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005231979] [2024-10-15 14:29:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:53,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:53,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:29:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:54,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:54,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005231979] [2024-10-15 14:29:54,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005231979] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:54,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181279914] [2024-10-15 14:29:54,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:29:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:54,036 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) [2024-10-15 14:29:54,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:29:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:54,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 14:29:54,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:54,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:29:54,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181279914] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:54,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:54,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2024-10-15 14:29:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959400408] [2024-10-15 14:29:54,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:54,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 14:29:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 14:29:54,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:29:54,400 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:54,858 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-10-15 14:29:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:29:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-10-15 14:29:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:54,860 INFO L225 Difference]: With dead ends: 207 [2024-10-15 14:29:54,860 INFO L226 Difference]: Without dead ends: 201 [2024-10-15 14:29:54,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:29:54,861 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:54,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1258 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:29:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-15 14:29:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 175. [2024-10-15 14:29:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 160 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-10-15 14:29:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-10-15 14:29:54,894 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 40 [2024-10-15 14:29:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:54,894 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-10-15 14:29:54,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:54,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-10-15 14:29:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 14:29:54,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:54,896 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:54,912 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:55,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-15 14:29:55,097 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:55,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:55,097 INFO L85 PathProgramCache]: Analyzing trace with hash 796563891, now seen corresponding path program 20 times [2024-10-15 14:29:55,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:55,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695404737] [2024-10-15 14:29:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:55,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:55,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:55,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:55,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 14:29:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 14:29:55,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695404737] [2024-10-15 14:29:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695404737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309956165] [2024-10-15 14:29:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:29:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:55,345 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) [2024-10-15 14:29:55,346 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:29:55,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:29:55,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:55,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:29:55,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 14:29:55,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 14:29:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309956165] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:55,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:55,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-10-15 14:29:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480058349] [2024-10-15 14:29:55,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:55,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:29:55,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:29:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:29:55,855 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:56,057 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-10-15 14:29:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:29:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-10-15 14:29:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:56,059 INFO L225 Difference]: With dead ends: 207 [2024-10-15 14:29:56,059 INFO L226 Difference]: Without dead ends: 193 [2024-10-15 14:29:56,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-10-15 14:29:56,061 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:56,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 389 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-10-15 14:29:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2024-10-15 14:29:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 171 states have internal predecessors, (188), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-10-15 14:29:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2024-10-15 14:29:56,104 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 40 [2024-10-15 14:29:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:56,104 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2024-10-15 14:29:56,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:56,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2024-10-15 14:29:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 14:29:56,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:56,107 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:56,122 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 14:29:56,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:56,307 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:56,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:56,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1988964868, now seen corresponding path program 21 times [2024-10-15 14:29:56,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:56,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704947870] [2024-10-15 14:29:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:56,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:56,414 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:56,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:29:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704947870] [2024-10-15 14:29:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704947870] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740623224] [2024-10-15 14:29:56,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:29:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:56,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:56,649 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) [2024-10-15 14:29:56,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:29:56,707 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-15 14:29:56,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:56,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:29:56,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:56,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:29:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740623224] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:56,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 30 [2024-10-15 14:29:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346730359] [2024-10-15 14:29:56,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:56,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-15 14:29:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-15 14:29:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:29:56,996 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:57,322 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-10-15 14:29:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:29:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-10-15 14:29:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:57,324 INFO L225 Difference]: With dead ends: 205 [2024-10-15 14:29:57,324 INFO L226 Difference]: Without dead ends: 191 [2024-10-15 14:29:57,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:29:57,326 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:57,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 796 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:29:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-15 14:29:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2024-10-15 14:29:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 169 states have internal predecessors, (187), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-10-15 14:29:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2024-10-15 14:29:57,368 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 40 [2024-10-15 14:29:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:57,368 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2024-10-15 14:29:57,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:29:57,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2024-10-15 14:29:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 14:29:57,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:57,372 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:57,388 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-15 14:29:57,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:57,572 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:57,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1164125907, now seen corresponding path program 22 times [2024-10-15 14:29:57,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:57,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958933373] [2024-10-15 14:29:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:57,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:57,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:57,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:29:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 14:29:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958933373] [2024-10-15 14:29:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958933373] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209989320] [2024-10-15 14:29:57,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:29:57,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:57,838 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) [2024-10-15 14:29:57,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:29:57,900 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:29:57,900 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:57,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:29:57,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 14:29:58,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-15 14:29:58,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209989320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:58,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:58,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-10-15 14:29:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436529877] [2024-10-15 14:29:58,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:58,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 14:29:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 14:29:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:29:58,277 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:29:58,486 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-10-15 14:29:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:29:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-10-15 14:29:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:29:58,489 INFO L225 Difference]: With dead ends: 199 [2024-10-15 14:29:58,489 INFO L226 Difference]: Without dead ends: 181 [2024-10-15 14:29:58,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-10-15 14:29:58,491 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:29:58,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 403 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:29:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-10-15 14:29:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2024-10-15 14:29:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 161 states have internal predecessors, (177), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-10-15 14:29:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2024-10-15 14:29:58,543 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 40 [2024-10-15 14:29:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:29:58,543 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2024-10-15 14:29:58,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:29:58,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2024-10-15 14:29:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:29:58,545 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:29:58,545 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:29:58,561 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:29:58,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-15 14:29:58,746 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:29:58,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:29:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1575716773, now seen corresponding path program 23 times [2024-10-15 14:29:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:29:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311997901] [2024-10-15 14:29:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:29:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:29:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:58,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:29:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:58,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:29:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:58,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:29:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:29:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:29:59,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311997901] [2024-10-15 14:29:59,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311997901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:29:59,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801487910] [2024-10-15 14:29:59,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:29:59,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:29:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:29:59,100 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) [2024-10-15 14:29:59,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:29:59,189 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-15 14:29:59,190 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:29:59,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:29:59,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:29:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:59,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:29:59,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:29:59,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801487910] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:29:59,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:29:59,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-10-15 14:29:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657028600] [2024-10-15 14:29:59,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:29:59,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:29:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:29:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:29:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:29:59,882 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:00,343 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2024-10-15 14:30:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:30:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-10-15 14:30:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:00,345 INFO L225 Difference]: With dead ends: 219 [2024-10-15 14:30:00,345 INFO L226 Difference]: Without dead ends: 206 [2024-10-15 14:30:00,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 14:30:00,347 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:00,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 507 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-15 14:30:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2024-10-15 14:30:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 179 states have internal predecessors, (197), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2024-10-15 14:30:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-10-15 14:30:00,390 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2024-10-15 14:30:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:00,390 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-10-15 14:30:00,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:00,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-10-15 14:30:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:30:00,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:00,392 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:00,407 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:00,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-15 14:30:00,596 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:00,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash -18482190, now seen corresponding path program 24 times [2024-10-15 14:30:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:00,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900362362] [2024-10-15 14:30:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:00,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:00,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:00,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:00,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:00,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900362362] [2024-10-15 14:30:00,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900362362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:00,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751220483] [2024-10-15 14:30:00,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:00,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:00,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:00,906 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) [2024-10-15 14:30:00,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:30:00,970 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:30:00,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:00,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:30:00,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:01,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:01,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751220483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:01,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:01,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-10-15 14:30:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205709420] [2024-10-15 14:30:01,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:01,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:30:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:30:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:30:01,687 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:02,093 INFO L93 Difference]: Finished difference Result 212 states and 253 transitions. [2024-10-15 14:30:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:30:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-10-15 14:30:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:02,095 INFO L225 Difference]: With dead ends: 212 [2024-10-15 14:30:02,095 INFO L226 Difference]: Without dead ends: 201 [2024-10-15 14:30:02,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 14:30:02,097 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:02,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-10-15 14:30:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-10-15 14:30:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 160 states have (on average 1.2375) internal successors, (198), 180 states have internal predecessors, (198), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-10-15 14:30:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2024-10-15 14:30:02,152 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 41 [2024-10-15 14:30:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:02,152 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2024-10-15 14:30:02,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:02,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2024-10-15 14:30:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:30:02,154 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:02,154 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:02,171 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:02,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-15 14:30:02,360 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:02,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1486012337, now seen corresponding path program 25 times [2024-10-15 14:30:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804260831] [2024-10-15 14:30:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804260831] [2024-10-15 14:30:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804260831] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136642571] [2024-10-15 14:30:02,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:02,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:02,448 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) [2024-10-15 14:30:02,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 14:30:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 14:30:02,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:02,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:02,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136642571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:02,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:02,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-10-15 14:30:02,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124901503] [2024-10-15 14:30:02,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:02,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:30:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:30:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:30:02,595 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:02,664 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2024-10-15 14:30:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:30:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-10-15 14:30:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:02,666 INFO L225 Difference]: With dead ends: 214 [2024-10-15 14:30:02,666 INFO L226 Difference]: Without dead ends: 198 [2024-10-15 14:30:02,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:30:02,667 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:02,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 139 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-15 14:30:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2024-10-15 14:30:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 171 states have internal predecessors, (189), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-10-15 14:30:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-10-15 14:30:02,723 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 41 [2024-10-15 14:30:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:02,723 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-10-15 14:30:02,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:02,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-10-15 14:30:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:30:02,724 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:02,724 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:02,736 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:02,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-15 14:30:02,925 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:02,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1010741786, now seen corresponding path program 26 times [2024-10-15 14:30:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482561424] [2024-10-15 14:30:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:02,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:30:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482561424] [2024-10-15 14:30:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482561424] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86740289] [2024-10-15 14:30:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:03,005 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) [2024-10-15 14:30:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-15 14:30:03,060 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:03,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:03,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-15 14:30:03,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:03,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86740289] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:03,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:03,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-10-15 14:30:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490419741] [2024-10-15 14:30:03,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:03,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 14:30:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 14:30:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-10-15 14:30:03,139 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:03,216 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2024-10-15 14:30:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:30:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-10-15 14:30:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:03,218 INFO L225 Difference]: With dead ends: 300 [2024-10-15 14:30:03,218 INFO L226 Difference]: Without dead ends: 193 [2024-10-15 14:30:03,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:30:03,220 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:03,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-10-15 14:30:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-10-15 14:30:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-10-15 14:30:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2024-10-15 14:30:03,269 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 41 [2024-10-15 14:30:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:03,270 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2024-10-15 14:30:03,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:03,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2024-10-15 14:30:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 14:30:03,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:03,272 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:03,286 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-15 14:30:03,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:03,472 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:03,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash 479671077, now seen corresponding path program 27 times [2024-10-15 14:30:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:03,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465613297] [2024-10-15 14:30:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:03,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:03,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:03,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:03,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:03,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465613297] [2024-10-15 14:30:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465613297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:03,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137162045] [2024-10-15 14:30:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:03,876 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:03,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-15 14:30:03,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:30:03,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:03,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:30:03,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:04,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:04,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137162045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:04,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:04,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 32 [2024-10-15 14:30:04,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054076733] [2024-10-15 14:30:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:04,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:30:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:30:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:30:04,221 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:04,773 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2024-10-15 14:30:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:30:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-15 14:30:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:04,775 INFO L225 Difference]: With dead ends: 245 [2024-10-15 14:30:04,775 INFO L226 Difference]: Without dead ends: 239 [2024-10-15 14:30:04,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:04,777 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:04,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1488 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-10-15 14:30:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2024-10-15 14:30:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 171 states have (on average 1.2105263157894737) internal successors, (207), 189 states have internal predecessors, (207), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2024-10-15 14:30:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2024-10-15 14:30:04,821 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 42 [2024-10-15 14:30:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:04,821 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2024-10-15 14:30:04,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:04,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2024-10-15 14:30:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 14:30:04,823 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:04,823 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:04,835 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:05,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-15 14:30:05,024 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:05,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash -432732607, now seen corresponding path program 28 times [2024-10-15 14:30:05,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:05,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243494068] [2024-10-15 14:30:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:05,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:05,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:05,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:05,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243494068] [2024-10-15 14:30:05,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243494068] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:05,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100664978] [2024-10-15 14:30:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:05,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:05,441 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:05,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-15 14:30:05,497 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:05,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:05,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 14:30:05,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:05,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:05,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100664978] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:05,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:05,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 32 [2024-10-15 14:30:05,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871154636] [2024-10-15 14:30:05,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:05,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:30:05,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:30:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:30:05,775 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:06,101 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-10-15 14:30:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:30:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-15 14:30:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:06,102 INFO L225 Difference]: With dead ends: 213 [2024-10-15 14:30:06,102 INFO L226 Difference]: Without dead ends: 193 [2024-10-15 14:30:06,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:06,104 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:06,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1090 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-10-15 14:30:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-10-15 14:30:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2024-10-15 14:30:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2024-10-15 14:30:06,149 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 42 [2024-10-15 14:30:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:06,149 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2024-10-15 14:30:06,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:06,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2024-10-15 14:30:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 14:30:06,150 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:06,150 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:06,162 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-15 14:30:06,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-15 14:30:06,351 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:06,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -49232091, now seen corresponding path program 29 times [2024-10-15 14:30:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212096295] [2024-10-15 14:30:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:06,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:06,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:06,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212096295] [2024-10-15 14:30:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212096295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888911524] [2024-10-15 14:30:06,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:30:06,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:06,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:06,694 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:06,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-15 14:30:06,761 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:30:06,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:06,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:30:06,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:07,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888911524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:07,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:07,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2024-10-15 14:30:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735512344] [2024-10-15 14:30:07,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:07,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:30:07,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:07,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:30:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:30:07,116 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:07,406 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2024-10-15 14:30:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:30:07,407 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-15 14:30:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:07,408 INFO L225 Difference]: With dead ends: 209 [2024-10-15 14:30:07,409 INFO L226 Difference]: Without dead ends: 203 [2024-10-15 14:30:07,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:07,410 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:07,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 709 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-10-15 14:30:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-10-15 14:30:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.2181818181818183) internal successors, (201), 183 states have internal predecessors, (201), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-10-15 14:30:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2024-10-15 14:30:07,476 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 42 [2024-10-15 14:30:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:07,476 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2024-10-15 14:30:07,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:07,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2024-10-15 14:30:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:30:07,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:07,479 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:07,496 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:07,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-15 14:30:07,679 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:07,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1257446830, now seen corresponding path program 30 times [2024-10-15 14:30:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410471382] [2024-10-15 14:30:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:07,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:07,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:07,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410471382] [2024-10-15 14:30:07,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410471382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184255258] [2024-10-15 14:30:07,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:07,985 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:07,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-15 14:30:08,043 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:30:08,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:08,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 14:30:08,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:08,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184255258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:08,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:08,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-10-15 14:30:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294382368] [2024-10-15 14:30:08,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:08,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:30:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:30:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:08,831 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:09,424 INFO L93 Difference]: Finished difference Result 243 states and 289 transitions. [2024-10-15 14:30:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:30:09,425 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-10-15 14:30:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:09,427 INFO L225 Difference]: With dead ends: 243 [2024-10-15 14:30:09,427 INFO L226 Difference]: Without dead ends: 230 [2024-10-15 14:30:09,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-10-15 14:30:09,428 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:09,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 560 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-10-15 14:30:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-10-15 14:30:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 203 states have internal predecessors, (223), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-10-15 14:30:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2024-10-15 14:30:09,487 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 43 [2024-10-15 14:30:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:09,487 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2024-10-15 14:30:09,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:09,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:09,488 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2024-10-15 14:30:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:30:09,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:09,489 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:09,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:09,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-15 14:30:09,690 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:09,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -227815013, now seen corresponding path program 31 times [2024-10-15 14:30:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:09,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122265269] [2024-10-15 14:30:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:09,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:09,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:09,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122265269] [2024-10-15 14:30:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122265269] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474067288] [2024-10-15 14:30:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:10,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:10,013 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:10,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-15 14:30:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:10,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 14:30:10,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:10,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474067288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:10,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-10-15 14:30:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732755873] [2024-10-15 14:30:10,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:10,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:30:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:30:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:10,915 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:11,520 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2024-10-15 14:30:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:30:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-10-15 14:30:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:11,522 INFO L225 Difference]: With dead ends: 236 [2024-10-15 14:30:11,522 INFO L226 Difference]: Without dead ends: 225 [2024-10-15 14:30:11,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-10-15 14:30:11,524 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:11,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 714 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-10-15 14:30:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-10-15 14:30:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 204 states have internal predecessors, (224), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-10-15 14:30:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 263 transitions. [2024-10-15 14:30:11,595 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 263 transitions. Word has length 43 [2024-10-15 14:30:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:11,595 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 263 transitions. [2024-10-15 14:30:11,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:11,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 263 transitions. [2024-10-15 14:30:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:30:11,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:11,599 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:11,615 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-15 14:30:11,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:11,799 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:11,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1451316090, now seen corresponding path program 32 times [2024-10-15 14:30:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:11,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742025640] [2024-10-15 14:30:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:11,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:11,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:11,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:11,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742025640] [2024-10-15 14:30:11,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742025640] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008529457] [2024-10-15 14:30:11,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:11,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:11,880 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:11,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-15 14:30:11,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:11,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:11,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:30:11,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:11,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008529457] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:12,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-10-15 14:30:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125998067] [2024-10-15 14:30:12,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:12,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 14:30:12,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:12,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 14:30:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-15 14:30:12,025 INFO L87 Difference]: Start difference. First operand 223 states and 263 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:12,135 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2024-10-15 14:30:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:30:12,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-10-15 14:30:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:12,138 INFO L225 Difference]: With dead ends: 391 [2024-10-15 14:30:12,138 INFO L226 Difference]: Without dead ends: 261 [2024-10-15 14:30:12,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:30:12,140 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:12,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-10-15 14:30:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-10-15 14:30:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 222 states have (on average 1.2117117117117118) internal successors, (269), 242 states have internal predecessors, (269), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-10-15 14:30:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2024-10-15 14:30:12,225 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 43 [2024-10-15 14:30:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:12,225 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2024-10-15 14:30:12,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:12,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2024-10-15 14:30:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:30:12,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:12,228 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:12,244 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:12,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-10-15 14:30:12,429 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:12,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash -397169103, now seen corresponding path program 33 times [2024-10-15 14:30:12,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:12,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726344511] [2024-10-15 14:30:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:12,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:12,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:12,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726344511] [2024-10-15 14:30:12,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726344511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:12,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059817900] [2024-10-15 14:30:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:12,522 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:12,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-15 14:30:12,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:30:12,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:12,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:30:12,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:12,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 14:30:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059817900] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:12,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:12,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-10-15 14:30:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243876145] [2024-10-15 14:30:12,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:12,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 14:30:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 14:30:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-15 14:30:12,712 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:12,876 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2024-10-15 14:30:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:30:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-10-15 14:30:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:12,878 INFO L225 Difference]: With dead ends: 323 [2024-10-15 14:30:12,878 INFO L226 Difference]: Without dead ends: 299 [2024-10-15 14:30:12,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:30:12,880 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:12,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-10-15 14:30:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-10-15 14:30:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-10-15 14:30:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 353 transitions. [2024-10-15 14:30:12,957 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 353 transitions. Word has length 43 [2024-10-15 14:30:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:12,958 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 353 transitions. [2024-10-15 14:30:12,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:12,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 353 transitions. [2024-10-15 14:30:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:30:12,960 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:12,960 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:12,973 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:13,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-10-15 14:30:13,161 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:13,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1714679140, now seen corresponding path program 34 times [2024-10-15 14:30:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:13,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872825660] [2024-10-15 14:30:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:13,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:13,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:13,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:13,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:13,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872825660] [2024-10-15 14:30:13,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872825660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:13,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272416356] [2024-10-15 14:30:13,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:13,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:13,569 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:13,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-15 14:30:13,645 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:13,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:13,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:30:13,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:13,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272416356] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:13,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 34 [2024-10-15 14:30:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477181828] [2024-10-15 14:30:13,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:13,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 14:30:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 14:30:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:30:13,917 INFO L87 Difference]: Start difference. First operand 299 states and 353 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:14,491 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2024-10-15 14:30:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:30:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-10-15 14:30:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:14,494 INFO L225 Difference]: With dead ends: 363 [2024-10-15 14:30:14,494 INFO L226 Difference]: Without dead ends: 357 [2024-10-15 14:30:14,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:30:14,497 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:14,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1994 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-10-15 14:30:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 313. [2024-10-15 14:30:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 271 states have (on average 1.2066420664206643) internal successors, (327), 293 states have internal predecessors, (327), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-10-15 14:30:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2024-10-15 14:30:14,607 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 44 [2024-10-15 14:30:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:14,607 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2024-10-15 14:30:14,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:14,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2024-10-15 14:30:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:30:14,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:14,610 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:14,628 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:14,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:14,811 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:14,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 403829916, now seen corresponding path program 35 times [2024-10-15 14:30:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175938904] [2024-10-15 14:30:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:14,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:14,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:15,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175938904] [2024-10-15 14:30:15,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175938904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142492551] [2024-10-15 14:30:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:30:15,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:15,248 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-15 14:30:15,320 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:30:15,321 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:15,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-15 14:30:15,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:15,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142492551] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:15,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:15,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 34 [2024-10-15 14:30:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986069060] [2024-10-15 14:30:15,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:15,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 14:30:15,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 14:30:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1043, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:30:15,598 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:16,033 INFO L93 Difference]: Finished difference Result 319 states and 375 transitions. [2024-10-15 14:30:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:30:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-10-15 14:30:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:16,035 INFO L225 Difference]: With dead ends: 319 [2024-10-15 14:30:16,035 INFO L226 Difference]: Without dead ends: 299 [2024-10-15 14:30:16,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:30:16,037 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:16,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1347 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-10-15 14:30:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-10-15 14:30:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-10-15 14:30:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 354 transitions. [2024-10-15 14:30:16,110 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 354 transitions. Word has length 44 [2024-10-15 14:30:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:16,110 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 354 transitions. [2024-10-15 14:30:16,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:16,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 354 transitions. [2024-10-15 14:30:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:30:16,113 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:16,113 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:16,129 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-10-15 14:30:16,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-10-15 14:30:16,318 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:16,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1740504941, now seen corresponding path program 36 times [2024-10-15 14:30:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:16,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524380433] [2024-10-15 14:30:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:16,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:16,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:16,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-15 14:30:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 14:30:16,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524380433] [2024-10-15 14:30:16,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524380433] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724822738] [2024-10-15 14:30:16,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:16,539 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:16,540 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-15 14:30:16,600 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-15 14:30:16,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:16,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 14:30:16,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:30:16,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:30:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724822738] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:17,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:17,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-10-15 14:30:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328335441] [2024-10-15 14:30:17,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:17,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:30:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:30:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:30:17,099 INFO L87 Difference]: Start difference. First operand 299 states and 354 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:17,471 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2024-10-15 14:30:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:30:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-10-15 14:30:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:17,474 INFO L225 Difference]: With dead ends: 343 [2024-10-15 14:30:17,474 INFO L226 Difference]: Without dead ends: 328 [2024-10-15 14:30:17,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:30:17,476 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:17,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 454 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-10-15 14:30:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2024-10-15 14:30:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 300 states have internal predecessors, (323), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-10-15 14:30:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 383 transitions. [2024-10-15 14:30:17,553 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 383 transitions. Word has length 44 [2024-10-15 14:30:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:17,553 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 383 transitions. [2024-10-15 14:30:17,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:17,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 383 transitions. [2024-10-15 14:30:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:30:17,555 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:17,555 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:17,566 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-10-15 14:30:17,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:17,756 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:17,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1448463004, now seen corresponding path program 37 times [2024-10-15 14:30:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:17,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871724598] [2024-10-15 14:30:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:17,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:17,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:17,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871724598] [2024-10-15 14:30:18,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871724598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340191669] [2024-10-15 14:30:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:18,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:18,067 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-15 14:30:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:18,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 14:30:18,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:18,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340191669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:18,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:18,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 34 [2024-10-15 14:30:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100566676] [2024-10-15 14:30:18,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:18,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-15 14:30:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-15 14:30:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:30:18,489 INFO L87 Difference]: Start difference. First operand 324 states and 383 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:18,855 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2024-10-15 14:30:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:30:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-10-15 14:30:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:18,858 INFO L225 Difference]: With dead ends: 340 [2024-10-15 14:30:18,858 INFO L226 Difference]: Without dead ends: 325 [2024-10-15 14:30:18,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:30:18,861 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:18,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 930 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-10-15 14:30:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2024-10-15 14:30:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 267 states have (on average 1.202247191011236) internal successors, (321), 297 states have internal predecessors, (321), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-10-15 14:30:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 381 transitions. [2024-10-15 14:30:18,953 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 381 transitions. Word has length 44 [2024-10-15 14:30:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:18,953 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 381 transitions. [2024-10-15 14:30:18,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:18,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 381 transitions. [2024-10-15 14:30:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 14:30:18,955 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:18,956 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:18,967 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-10-15 14:30:19,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-10-15 14:30:19,156 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:19,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash -296415821, now seen corresponding path program 38 times [2024-10-15 14:30:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:19,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618021984] [2024-10-15 14:30:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:19,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:19,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:19,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 14:30:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618021984] [2024-10-15 14:30:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618021984] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838513750] [2024-10-15 14:30:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:19,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:19,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:19,397 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:19,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-15 14:30:19,459 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:19,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:19,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-15 14:30:19,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:30:19,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 14:30:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838513750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:19,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-10-15 14:30:19,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374463359] [2024-10-15 14:30:19,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:19,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 14:30:19,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 14:30:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:30:19,961 INFO L87 Difference]: Start difference. First operand 321 states and 381 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:20,305 INFO L93 Difference]: Finished difference Result 333 states and 392 transitions. [2024-10-15 14:30:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:30:20,306 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-10-15 14:30:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:20,307 INFO L225 Difference]: With dead ends: 333 [2024-10-15 14:30:20,307 INFO L226 Difference]: Without dead ends: 313 [2024-10-15 14:30:20,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:30:20,310 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:20,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 446 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-10-15 14:30:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2024-10-15 14:30:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 257 states have (on average 1.2023346303501945) internal successors, (309), 287 states have internal predecessors, (309), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2024-10-15 14:30:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2024-10-15 14:30:20,399 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 44 [2024-10-15 14:30:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:20,399 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2024-10-15 14:30:20,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:20,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2024-10-15 14:30:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-15 14:30:20,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:20,402 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:20,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-10-15 14:30:20,602 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:20,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -562826821, now seen corresponding path program 39 times [2024-10-15 14:30:20,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:20,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541025612] [2024-10-15 14:30:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:20,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:20,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:20,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:20,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541025612] [2024-10-15 14:30:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541025612] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963297815] [2024-10-15 14:30:20,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:20,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:20,940 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-15 14:30:21,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:30:21,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:21,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 14:30:21,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:21,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963297815] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:22,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:22,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-10-15 14:30:22,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137046371] [2024-10-15 14:30:22,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:22,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:30:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:30:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:30:22,098 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:23,144 INFO L93 Difference]: Finished difference Result 371 states and 438 transitions. [2024-10-15 14:30:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:30:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-10-15 14:30:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:23,148 INFO L225 Difference]: With dead ends: 371 [2024-10-15 14:30:23,148 INFO L226 Difference]: Without dead ends: 358 [2024-10-15 14:30:23,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-10-15 14:30:23,153 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:23,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 732 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:30:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-10-15 14:30:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2024-10-15 14:30:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 290 states have (on average 1.2) internal successors, (348), 324 states have internal predecessors, (348), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2024-10-15 14:30:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 412 transitions. [2024-10-15 14:30:23,291 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 412 transitions. Word has length 45 [2024-10-15 14:30:23,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:23,291 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 412 transitions. [2024-10-15 14:30:23,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:23,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 412 transitions. [2024-10-15 14:30:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-15 14:30:23,296 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:23,296 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:23,313 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:23,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-10-15 14:30:23,497 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:23,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1290988434, now seen corresponding path program 40 times [2024-10-15 14:30:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987916495] [2024-10-15 14:30:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:23,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:23,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:23,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:23,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987916495] [2024-10-15 14:30:23,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987916495] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:23,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020114076] [2024-10-15 14:30:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:23,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:23,877 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:23,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-10-15 14:30:23,949 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:23,950 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:23,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 14:30:23,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:24,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020114076] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:24,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:24,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-10-15 14:30:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496110373] [2024-10-15 14:30:24,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:24,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:30:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:30:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:30:24,976 INFO L87 Difference]: Start difference. First operand 350 states and 412 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:25,806 INFO L93 Difference]: Finished difference Result 364 states and 426 transitions. [2024-10-15 14:30:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:30:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-10-15 14:30:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:25,809 INFO L225 Difference]: With dead ends: 364 [2024-10-15 14:30:25,809 INFO L226 Difference]: Without dead ends: 353 [2024-10-15 14:30:25,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-10-15 14:30:25,812 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:25,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 799 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-10-15 14:30:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2024-10-15 14:30:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 291 states have (on average 1.1993127147766323) internal successors, (349), 325 states have internal predecessors, (349), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-10-15 14:30:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 410 transitions. [2024-10-15 14:30:25,917 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 410 transitions. Word has length 45 [2024-10-15 14:30:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:25,917 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 410 transitions. [2024-10-15 14:30:25,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:25,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 410 transitions. [2024-10-15 14:30:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-15 14:30:25,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:25,920 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:25,932 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-10-15 14:30:26,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-10-15 14:30:26,120 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:26,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 973220789, now seen corresponding path program 41 times [2024-10-15 14:30:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:26,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815887449] [2024-10-15 14:30:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:26,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815887449] [2024-10-15 14:30:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815887449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605651868] [2024-10-15 14:30:26,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:30:26,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:26,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:26,209 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:26,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-10-15 14:30:26,290 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:30:26,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:26,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:30:26,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:26,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:26,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605651868] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:26,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:26,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-10-15 14:30:26,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115161837] [2024-10-15 14:30:26,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:26,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:30:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:26,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:30:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:30:26,390 INFO L87 Difference]: Start difference. First operand 351 states and 410 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:26,554 INFO L93 Difference]: Finished difference Result 372 states and 435 transitions. [2024-10-15 14:30:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:30:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-10-15 14:30:26,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:26,557 INFO L225 Difference]: With dead ends: 372 [2024-10-15 14:30:26,557 INFO L226 Difference]: Without dead ends: 352 [2024-10-15 14:30:26,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:30:26,560 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:26,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-10-15 14:30:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2024-10-15 14:30:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 288 states have (on average 1.1875) internal successors, (342), 318 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-10-15 14:30:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 395 transitions. [2024-10-15 14:30:26,654 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 395 transitions. Word has length 45 [2024-10-15 14:30:26,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:26,654 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 395 transitions. [2024-10-15 14:30:26,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:26,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 395 transitions. [2024-10-15 14:30:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-15 14:30:26,657 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:26,657 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:26,669 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-10-15 14:30:26,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:26,857 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:26,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash -85619334, now seen corresponding path program 42 times [2024-10-15 14:30:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338664824] [2024-10-15 14:30:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-15 14:30:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:26,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:26,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338664824] [2024-10-15 14:30:26,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338664824] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:26,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481758714] [2024-10-15 14:30:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:26,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:26,934 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:26,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-10-15 14:30:27,002 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-15 14:30:27,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:27,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:30:27,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:27,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481758714] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:27,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:27,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-10-15 14:30:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351652168] [2024-10-15 14:30:27,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:27,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:30:27,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:30:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:30:27,104 INFO L87 Difference]: Start difference. First operand 342 states and 395 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:27,340 INFO L93 Difference]: Finished difference Result 535 states and 612 transitions. [2024-10-15 14:30:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:30:27,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-10-15 14:30:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:27,345 INFO L225 Difference]: With dead ends: 535 [2024-10-15 14:30:27,345 INFO L226 Difference]: Without dead ends: 349 [2024-10-15 14:30:27,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:30:27,348 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:27,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 217 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:30:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-15 14:30:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-10-15 14:30:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-10-15 14:30:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 402 transitions. [2024-10-15 14:30:27,483 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 402 transitions. Word has length 45 [2024-10-15 14:30:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:27,485 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 402 transitions. [2024-10-15 14:30:27,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:27,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 402 transitions. [2024-10-15 14:30:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:30:27,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:27,489 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:27,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:27,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:27,690 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:27,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1876412539, now seen corresponding path program 43 times [2024-10-15 14:30:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:27,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928555648] [2024-10-15 14:30:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:27,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:27,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:27,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:27,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:28,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928555648] [2024-10-15 14:30:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928555648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:28,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724282186] [2024-10-15 14:30:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:28,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:28,129 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:28,130 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-10-15 14:30:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:28,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:30:28,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:28,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724282186] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:28,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:28,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 36 [2024-10-15 14:30:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005532546] [2024-10-15 14:30:28,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:28,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:30:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:30:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:30:28,487 INFO L87 Difference]: Start difference. First operand 349 states and 402 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:29,154 INFO L93 Difference]: Finished difference Result 419 states and 483 transitions. [2024-10-15 14:30:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:30:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-15 14:30:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:29,158 INFO L225 Difference]: With dead ends: 419 [2024-10-15 14:30:29,158 INFO L226 Difference]: Without dead ends: 413 [2024-10-15 14:30:29,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:29,161 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:29,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 2246 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:30:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-10-15 14:30:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 363. [2024-10-15 14:30:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 306 states have (on average 1.1830065359477124) internal successors, (362), 338 states have internal predecessors, (362), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2024-10-15 14:30:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2024-10-15 14:30:29,277 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 46 [2024-10-15 14:30:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:29,277 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2024-10-15 14:30:29,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:29,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2024-10-15 14:30:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:30:29,279 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:29,279 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:29,291 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:29,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:29,480 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:29,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash -493129823, now seen corresponding path program 44 times [2024-10-15 14:30:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464709149] [2024-10-15 14:30:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:29,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:29,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:29,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:29,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:29,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:29,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464709149] [2024-10-15 14:30:29,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464709149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:29,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939413004] [2024-10-15 14:30:29,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:29,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:29,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:29,844 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:29,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-10-15 14:30:29,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:29,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:29,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:30:29,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:30,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939413004] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:30,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-10-15 14:30:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624310191] [2024-10-15 14:30:30,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:30,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:30:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:30:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:30:30,235 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:30,764 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2024-10-15 14:30:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:30:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-15 14:30:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:30,767 INFO L225 Difference]: With dead ends: 369 [2024-10-15 14:30:30,767 INFO L226 Difference]: Without dead ends: 349 [2024-10-15 14:30:30,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:30,769 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:30,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1707 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-15 14:30:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-10-15 14:30:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2024-10-15 14:30:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2024-10-15 14:30:30,864 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 46 [2024-10-15 14:30:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:30,864 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2024-10-15 14:30:30,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:30,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2024-10-15 14:30:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:30:30,866 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:30,866 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:30,878 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:31,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:31,067 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:31,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -573359227, now seen corresponding path program 45 times [2024-10-15 14:30:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384539372] [2024-10-15 14:30:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:31,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:31,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:31,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:31,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384539372] [2024-10-15 14:30:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384539372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489291482] [2024-10-15 14:30:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:31,403 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:31,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-10-15 14:30:31,472 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:30:31,472 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:31,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:30:31,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:31,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489291482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:31,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 36 [2024-10-15 14:30:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032596093] [2024-10-15 14:30:31,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:31,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:30:31,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:30:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:30:31,817 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:32,254 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2024-10-15 14:30:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:30:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-15 14:30:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:32,256 INFO L225 Difference]: With dead ends: 355 [2024-10-15 14:30:32,256 INFO L226 Difference]: Without dead ends: 333 [2024-10-15 14:30:32,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:32,258 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:32,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1301 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-10-15 14:30:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2024-10-15 14:30:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.1843971631205674) internal successors, (334), 310 states have internal predecessors, (334), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2024-10-15 14:30:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 385 transitions. [2024-10-15 14:30:32,431 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 385 transitions. Word has length 46 [2024-10-15 14:30:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:32,431 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 385 transitions. [2024-10-15 14:30:32,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:32,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 385 transitions. [2024-10-15 14:30:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:30:32,433 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:32,433 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:32,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:32,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:32,633 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:32,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1234099105, now seen corresponding path program 46 times [2024-10-15 14:30:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487848758] [2024-10-15 14:30:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:32,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:32,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:32,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:32,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:32,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487848758] [2024-10-15 14:30:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487848758] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352682603] [2024-10-15 14:30:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:32,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:32,953 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:32,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-10-15 14:30:33,021 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:33,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:33,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 14:30:33,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:33,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352682603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:33,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2024-10-15 14:30:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805341071] [2024-10-15 14:30:33,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:33,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 14:30:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 14:30:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:30:33,388 INFO L87 Difference]: Start difference. First operand 333 states and 385 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:33,736 INFO L93 Difference]: Finished difference Result 349 states and 404 transitions. [2024-10-15 14:30:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:30:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-10-15 14:30:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:33,738 INFO L225 Difference]: With dead ends: 349 [2024-10-15 14:30:33,738 INFO L226 Difference]: Without dead ends: 343 [2024-10-15 14:30:33,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:30:33,740 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:33,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 733 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-10-15 14:30:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2024-10-15 14:30:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 287 states have (on average 1.1881533101045296) internal successors, (341), 317 states have internal predecessors, (341), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2024-10-15 14:30:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 396 transitions. [2024-10-15 14:30:33,837 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 396 transitions. Word has length 46 [2024-10-15 14:30:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:33,837 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 396 transitions. [2024-10-15 14:30:33,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:33,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 396 transitions. [2024-10-15 14:30:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 14:30:33,841 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:33,841 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:33,857 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-10-15 14:30:34,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:34,045 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:34,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:34,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1281594894, now seen corresponding path program 47 times [2024-10-15 14:30:34,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:34,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167387653] [2024-10-15 14:30:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:34,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:34,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:34,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:34,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:34,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:34,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167387653] [2024-10-15 14:30:34,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167387653] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:34,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192131721] [2024-10-15 14:30:34,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:30:34,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:34,430 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:34,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-10-15 14:30:34,500 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:30:34,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:34,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:30:34,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:34,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192131721] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:35,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:35,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-10-15 14:30:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029815650] [2024-10-15 14:30:35,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:35,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-15 14:30:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-15 14:30:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:30:35,717 INFO L87 Difference]: Start difference. First operand 341 states and 396 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:36,834 INFO L93 Difference]: Finished difference Result 403 states and 471 transitions. [2024-10-15 14:30:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:30:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-10-15 14:30:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:36,838 INFO L225 Difference]: With dead ends: 403 [2024-10-15 14:30:36,838 INFO L226 Difference]: Without dead ends: 390 [2024-10-15 14:30:36,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 14:30:36,840 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:36,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 774 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:30:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-10-15 14:30:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 382. [2024-10-15 14:30:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 322 states have (on average 1.186335403726708) internal successors, (382), 356 states have internal predecessors, (382), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2024-10-15 14:30:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2024-10-15 14:30:36,959 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 47 [2024-10-15 14:30:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:36,959 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2024-10-15 14:30:36,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:36,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2024-10-15 14:30:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 14:30:36,961 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:36,961 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:36,974 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-10-15 14:30:37,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-10-15 14:30:37,162 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:37,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:37,162 INFO L85 PathProgramCache]: Analyzing trace with hash 352103163, now seen corresponding path program 48 times [2024-10-15 14:30:37,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068729509] [2024-10-15 14:30:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:37,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:37,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:37,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:37,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068729509] [2024-10-15 14:30:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068729509] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626982264] [2024-10-15 14:30:37,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:37,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:37,632 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:37,633 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-10-15 14:30:37,705 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:30:37,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:37,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:30:37,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:38,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:38,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626982264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:38,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-10-15 14:30:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106945371] [2024-10-15 14:30:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:38,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-15 14:30:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-15 14:30:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:30:38,887 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:39,925 INFO L93 Difference]: Finished difference Result 396 states and 459 transitions. [2024-10-15 14:30:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:30:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-10-15 14:30:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:39,927 INFO L225 Difference]: With dead ends: 396 [2024-10-15 14:30:39,927 INFO L226 Difference]: Without dead ends: 385 [2024-10-15 14:30:39,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-10-15 14:30:39,930 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:39,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 829 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-15 14:30:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2024-10-15 14:30:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 323 states have (on average 1.1857585139318885) internal successors, (383), 357 states have internal predecessors, (383), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-10-15 14:30:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-10-15 14:30:40,073 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 47 [2024-10-15 14:30:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:40,073 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-10-15 14:30:40,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:40,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-10-15 14:30:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 14:30:40,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:40,078 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:40,093 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-10-15 14:30:40,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-10-15 14:30:40,278 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:40,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -804302246, now seen corresponding path program 49 times [2024-10-15 14:30:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:40,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891294150] [2024-10-15 14:30:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:40,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:40,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:40,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891294150] [2024-10-15 14:30:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891294150] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036505839] [2024-10-15 14:30:40,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:40,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:40,395 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:40,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-10-15 14:30:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:40,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:30:40,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:40,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:40,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036505839] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:40,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:40,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-10-15 14:30:40,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677206083] [2024-10-15 14:30:40,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:40,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:30:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:30:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:30:40,579 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:40,805 INFO L93 Difference]: Finished difference Result 654 states and 759 transitions. [2024-10-15 14:30:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:30:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-10-15 14:30:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:40,811 INFO L225 Difference]: With dead ends: 654 [2024-10-15 14:30:40,811 INFO L226 Difference]: Without dead ends: 441 [2024-10-15 14:30:40,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:30:40,814 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:40,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-10-15 14:30:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2024-10-15 14:30:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 381 states have (on average 1.1811023622047243) internal successors, (450), 415 states have internal predecessors, (450), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-10-15 14:30:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 510 transitions. [2024-10-15 14:30:40,968 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 510 transitions. Word has length 47 [2024-10-15 14:30:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:40,969 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 510 transitions. [2024-10-15 14:30:40,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:40,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 510 transitions. [2024-10-15 14:30:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-15 14:30:40,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:40,971 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:40,983 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:41,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-10-15 14:30:41,172 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:41,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 731392309, now seen corresponding path program 50 times [2024-10-15 14:30:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852396892] [2024-10-15 14:30:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:41,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:41,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:41,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:41,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:41,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852396892] [2024-10-15 14:30:41,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852396892] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060739593] [2024-10-15 14:30:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:41,267 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:41,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-10-15 14:30:41,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:41,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:41,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:30:41,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:41,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-15 14:30:41,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060739593] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:41,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-10-15 14:30:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222194712] [2024-10-15 14:30:41,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:41,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:30:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:30:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:30:41,454 INFO L87 Difference]: Start difference. First operand 441 states and 510 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:41,700 INFO L93 Difference]: Finished difference Result 529 states and 623 transitions. [2024-10-15 14:30:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:30:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-10-15 14:30:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:41,702 INFO L225 Difference]: With dead ends: 529 [2024-10-15 14:30:41,702 INFO L226 Difference]: Without dead ends: 499 [2024-10-15 14:30:41,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:30:41,706 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:41,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:30:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-15 14:30:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-10-15 14:30:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-10-15 14:30:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 577 transitions. [2024-10-15 14:30:41,869 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 577 transitions. Word has length 47 [2024-10-15 14:30:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:41,869 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 577 transitions. [2024-10-15 14:30:41,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:30:41,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 577 transitions. [2024-10-15 14:30:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:41,875 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:41,875 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:41,892 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-10-15 14:30:42,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-10-15 14:30:42,076 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:42,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -917084868, now seen corresponding path program 51 times [2024-10-15 14:30:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:42,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888969315] [2024-10-15 14:30:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:42,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:42,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:42,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:42,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888969315] [2024-10-15 14:30:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888969315] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479703343] [2024-10-15 14:30:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:42,544 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:42,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-10-15 14:30:42,619 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:30:42,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:42,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:30:42,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:42,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:30:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479703343] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:42,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:42,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 38 [2024-10-15 14:30:42,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712471177] [2024-10-15 14:30:42,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:42,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:42,921 INFO L87 Difference]: Start difference. First operand 499 states and 577 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:43,775 INFO L93 Difference]: Finished difference Result 583 states and 674 transitions. [2024-10-15 14:30:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:30:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-10-15 14:30:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:43,779 INFO L225 Difference]: With dead ends: 583 [2024-10-15 14:30:43,779 INFO L226 Difference]: Without dead ends: 577 [2024-10-15 14:30:43,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:30:43,782 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:43,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2645 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:30:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-10-15 14:30:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 513. [2024-10-15 14:30:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 450 states have (on average 1.1777777777777778) internal successors, (530), 486 states have internal predecessors, (530), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2024-10-15 14:30:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 594 transitions. [2024-10-15 14:30:43,989 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 594 transitions. Word has length 48 [2024-10-15 14:30:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:43,989 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 594 transitions. [2024-10-15 14:30:43,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:43,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 594 transitions. [2024-10-15 14:30:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:43,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:43,993 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:44,005 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-10-15 14:30:44,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:44,194 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:44,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash 442135356, now seen corresponding path program 52 times [2024-10-15 14:30:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:44,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778442480] [2024-10-15 14:30:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:44,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:44,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:44,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:44,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:44,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778442480] [2024-10-15 14:30:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778442480] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811794115] [2024-10-15 14:30:44,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:44,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:44,613 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:44,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-10-15 14:30:44,686 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:44,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:44,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:30:44,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:44,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:30:45,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811794115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:45,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 38 [2024-10-15 14:30:45,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164829525] [2024-10-15 14:30:45,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:45,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1319, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:45,019 INFO L87 Difference]: Start difference. First operand 513 states and 594 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:45,688 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2024-10-15 14:30:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:30:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-10-15 14:30:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:45,691 INFO L225 Difference]: With dead ends: 519 [2024-10-15 14:30:45,692 INFO L226 Difference]: Without dead ends: 499 [2024-10-15 14:30:45,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:30:45,696 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:45,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1936 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-15 14:30:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-10-15 14:30:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-10-15 14:30:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2024-10-15 14:30:45,913 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 48 [2024-10-15 14:30:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:45,913 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2024-10-15 14:30:45,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:45,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2024-10-15 14:30:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:45,917 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:45,917 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:45,934 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-10-15 14:30:46,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:46,118 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:46,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2109377852, now seen corresponding path program 53 times [2024-10-15 14:30:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262646917] [2024-10-15 14:30:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:46,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:46,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:46,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262646917] [2024-10-15 14:30:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262646917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076826486] [2024-10-15 14:30:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:30:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:46,523 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:46,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-10-15 14:30:46,599 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-15 14:30:46,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:46,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-15 14:30:46,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:46,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:30:46,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076826486] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:46,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 38 [2024-10-15 14:30:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627710375] [2024-10-15 14:30:46,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:46,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:46,956 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:47,564 INFO L93 Difference]: Finished difference Result 505 states and 583 transitions. [2024-10-15 14:30:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:30:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-10-15 14:30:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:47,567 INFO L225 Difference]: With dead ends: 505 [2024-10-15 14:30:47,567 INFO L226 Difference]: Without dead ends: 483 [2024-10-15 14:30:47,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:30:47,569 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:47,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1441 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:30:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-10-15 14:30:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2024-10-15 14:30:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 426 states have (on average 1.1784037558685445) internal successors, (502), 458 states have internal predecessors, (502), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2024-10-15 14:30:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 560 transitions. [2024-10-15 14:30:47,723 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 560 transitions. Word has length 48 [2024-10-15 14:30:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:47,723 INFO L471 AbstractCegarLoop]: Abstraction has 483 states and 560 transitions. [2024-10-15 14:30:47,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:47,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 560 transitions. [2024-10-15 14:30:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:47,727 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:47,727 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:47,744 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:47,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:47,928 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:47,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1301335053, now seen corresponding path program 54 times [2024-10-15 14:30:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768062759] [2024-10-15 14:30:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:47,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:47,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:48,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-15 14:30:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-15 14:30:48,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:48,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768062759] [2024-10-15 14:30:48,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768062759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:48,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266725586] [2024-10-15 14:30:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:30:48,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:48,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:48,229 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:48,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-10-15 14:30:48,304 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:30:48,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:48,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:30:48,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-15 14:30:48,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-15 14:30:48,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266725586] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:48,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:48,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-10-15 14:30:48,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624009911] [2024-10-15 14:30:48,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:48,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:48,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:48,962 INFO L87 Difference]: Start difference. First operand 483 states and 560 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:49,534 INFO L93 Difference]: Finished difference Result 539 states and 630 transitions. [2024-10-15 14:30:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:30:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-10-15 14:30:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:49,542 INFO L225 Difference]: With dead ends: 539 [2024-10-15 14:30:49,542 INFO L226 Difference]: Without dead ends: 523 [2024-10-15 14:30:49,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-10-15 14:30:49,545 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:49,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 538 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:30:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-10-15 14:30:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2024-10-15 14:30:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 441 states have (on average 1.1700680272108843) internal successors, (516), 487 states have internal predecessors, (516), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-10-15 14:30:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 602 transitions. [2024-10-15 14:30:49,742 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 602 transitions. Word has length 48 [2024-10-15 14:30:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:49,743 INFO L471 AbstractCegarLoop]: Abstraction has 519 states and 602 transitions. [2024-10-15 14:30:49,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:49,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 602 transitions. [2024-10-15 14:30:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:49,745 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:49,746 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:49,757 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-10-15 14:30:49,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:49,946 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:49,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash 948849468, now seen corresponding path program 55 times [2024-10-15 14:30:49,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:49,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381122529] [2024-10-15 14:30:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:49,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:50,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:50,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:50,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:50,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:50,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381122529] [2024-10-15 14:30:50,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381122529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:50,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719261219] [2024-10-15 14:30:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:30:50,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:50,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:50,287 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:50,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-10-15 14:30:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:50,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:30:50,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:50,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:30:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719261219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:50,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2024-10-15 14:30:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963379292] [2024-10-15 14:30:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:50,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:50,817 INFO L87 Difference]: Start difference. First operand 519 states and 602 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:51,429 INFO L93 Difference]: Finished difference Result 535 states and 622 transitions. [2024-10-15 14:30:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:30:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-10-15 14:30:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:51,433 INFO L225 Difference]: With dead ends: 535 [2024-10-15 14:30:51,433 INFO L226 Difference]: Without dead ends: 519 [2024-10-15 14:30:51,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:30:51,436 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:51,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 965 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-10-15 14:30:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 515. [2024-10-15 14:30:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.173913043478261) internal successors, (513), 483 states have internal predecessors, (513), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-10-15 14:30:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 599 transitions. [2024-10-15 14:30:51,607 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 599 transitions. Word has length 48 [2024-10-15 14:30:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:51,608 INFO L471 AbstractCegarLoop]: Abstraction has 515 states and 599 transitions. [2024-10-15 14:30:51,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:30:51,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 599 transitions. [2024-10-15 14:30:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:30:51,611 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:51,611 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:51,622 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:51,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:51,811 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:51,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2036774893, now seen corresponding path program 56 times [2024-10-15 14:30:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609373687] [2024-10-15 14:30:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:51,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:51,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:51,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:30:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-15 14:30:52,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:52,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609373687] [2024-10-15 14:30:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609373687] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:52,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336829653] [2024-10-15 14:30:52,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:30:52,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:52,083 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:52,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-10-15 14:30:52,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:30:52,162 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:52,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-15 14:30:52,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-15 14:30:52,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-15 14:30:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336829653] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:52,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-10-15 14:30:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705898382] [2024-10-15 14:30:52,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:52,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 14:30:52,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 14:30:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:30:52,823 INFO L87 Difference]: Start difference. First operand 515 states and 599 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:53,456 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2024-10-15 14:30:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:30:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-10-15 14:30:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:53,459 INFO L225 Difference]: With dead ends: 527 [2024-10-15 14:30:53,459 INFO L226 Difference]: Without dead ends: 505 [2024-10-15 14:30:53,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-10-15 14:30:53,462 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:53,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 596 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:30:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-10-15 14:30:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2024-10-15 14:30:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 425 states have (on average 1.1741176470588235) internal successors, (499), 471 states have internal predecessors, (499), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2024-10-15 14:30:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 579 transitions. [2024-10-15 14:30:53,640 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 579 transitions. Word has length 48 [2024-10-15 14:30:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:53,641 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 579 transitions. [2024-10-15 14:30:53,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:53,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 579 transitions. [2024-10-15 14:30:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:30:53,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:53,646 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:53,663 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:53,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-10-15 14:30:53,846 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:53,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1607208165, now seen corresponding path program 57 times [2024-10-15 14:30:53,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:53,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114123708] [2024-10-15 14:30:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:53,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:53,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:53,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:54,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:30:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:54,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:54,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114123708] [2024-10-15 14:30:54,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114123708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:54,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797221965] [2024-10-15 14:30:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:30:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:54,412 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:54,416 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-10-15 14:30:54,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:30:54,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:54,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 14:30:54,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:55,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:30:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:56,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797221965] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:30:56,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:30:56,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-10-15 14:30:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61920883] [2024-10-15 14:30:56,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:30:56,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-15 14:30:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:30:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-15 14:30:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-10-15 14:30:56,022 INFO L87 Difference]: Start difference. First operand 503 states and 579 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:30:57,504 INFO L93 Difference]: Finished difference Result 585 states and 678 transitions. [2024-10-15 14:30:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:30:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-10-15 14:30:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:30:57,510 INFO L225 Difference]: With dead ends: 585 [2024-10-15 14:30:57,510 INFO L226 Difference]: Without dead ends: 572 [2024-10-15 14:30:57,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-10-15 14:30:57,516 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:30:57,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 899 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:30:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-10-15 14:30:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2024-10-15 14:30:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 529 states have internal predecessors, (559), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2024-10-15 14:30:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 651 transitions. [2024-10-15 14:30:57,705 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 651 transitions. Word has length 49 [2024-10-15 14:30:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:30:57,705 INFO L471 AbstractCegarLoop]: Abstraction has 564 states and 651 transitions. [2024-10-15 14:30:57,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:30:57,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 651 transitions. [2024-10-15 14:30:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:30:57,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:30:57,709 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:30:57,721 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-10-15 14:30:57,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:57,909 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:30:57,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:30:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791346, now seen corresponding path program 58 times [2024-10-15 14:30:57,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:30:57,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861791233] [2024-10-15 14:30:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:30:57,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:30:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:57,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:30:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:57,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:30:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:58,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:30:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:30:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:58,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:30:58,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861791233] [2024-10-15 14:30:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861791233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:30:58,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232731045] [2024-10-15 14:30:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:30:58,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:30:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:30:58,383 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:30:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-10-15 14:30:58,465 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:30:58,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:30:58,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-15 14:30:58,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:30:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:30:59,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:00,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232731045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:00,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:00,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-10-15 14:31:00,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542177695] [2024-10-15 14:31:00,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:00,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-15 14:31:00,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-15 14:31:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-10-15 14:31:00,065 INFO L87 Difference]: Start difference. First operand 564 states and 651 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:01,588 INFO L93 Difference]: Finished difference Result 578 states and 665 transitions. [2024-10-15 14:31:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:31:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-10-15 14:31:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:01,591 INFO L225 Difference]: With dead ends: 578 [2024-10-15 14:31:01,591 INFO L226 Difference]: Without dead ends: 567 [2024-10-15 14:31:01,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-10-15 14:31:01,595 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:01,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1147 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:31:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-10-15 14:31:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2024-10-15 14:31:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 478 states have (on average 1.1715481171548117) internal successors, (560), 530 states have internal predecessors, (560), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-10-15 14:31:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 648 transitions. [2024-10-15 14:31:01,794 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 648 transitions. Word has length 49 [2024-10-15 14:31:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:01,794 INFO L471 AbstractCegarLoop]: Abstraction has 565 states and 648 transitions. [2024-10-15 14:31:01,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:01,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 648 transitions. [2024-10-15 14:31:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:31:01,798 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:01,798 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:01,809 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-10-15 14:31:01,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-10-15 14:31:01,998 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:01,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1028676879, now seen corresponding path program 59 times [2024-10-15 14:31:01,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:01,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759668955] [2024-10-15 14:31:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:02,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:02,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:02,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:02,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759668955] [2024-10-15 14:31:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759668955] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724450278] [2024-10-15 14:31:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:02,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:02,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:02,098 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:02,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-10-15 14:31:02,189 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-15 14:31:02,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:02,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-15 14:31:02,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:02,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:02,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724450278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:02,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:02,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-10-15 14:31:02,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571747381] [2024-10-15 14:31:02,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:02,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:31:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:31:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:31:02,353 INFO L87 Difference]: Start difference. First operand 565 states and 648 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:02,660 INFO L93 Difference]: Finished difference Result 592 states and 681 transitions. [2024-10-15 14:31:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:31:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-10-15 14:31:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:02,664 INFO L225 Difference]: With dead ends: 592 [2024-10-15 14:31:02,664 INFO L226 Difference]: Without dead ends: 568 [2024-10-15 14:31:02,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:31:02,669 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:02,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 232 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-10-15 14:31:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2024-10-15 14:31:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 477 states have (on average 1.1635220125786163) internal successors, (555), 525 states have internal predecessors, (555), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-10-15 14:31:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 635 transitions. [2024-10-15 14:31:02,907 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 635 transitions. Word has length 49 [2024-10-15 14:31:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:02,907 INFO L471 AbstractCegarLoop]: Abstraction has 558 states and 635 transitions. [2024-10-15 14:31:02,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:02,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 635 transitions. [2024-10-15 14:31:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 14:31:02,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:02,911 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:02,927 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-10-15 14:31:03,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-10-15 14:31:03,112 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:03,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -853281446, now seen corresponding path program 60 times [2024-10-15 14:31:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:03,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265415046] [2024-10-15 14:31:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:03,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:03,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:03,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:03,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 14:31:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:03,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265415046] [2024-10-15 14:31:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265415046] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186509994] [2024-10-15 14:31:03,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:31:03,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:03,213 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:03,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-10-15 14:31:03,298 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:31:03,299 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:03,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-15 14:31:03,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:03,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186509994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:03,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:03,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-10-15 14:31:03,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019779208] [2024-10-15 14:31:03,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:03,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:31:03,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:31:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:31:03,431 INFO L87 Difference]: Start difference. First operand 558 states and 635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:03,737 INFO L93 Difference]: Finished difference Result 861 states and 969 transitions. [2024-10-15 14:31:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:31:03,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-10-15 14:31:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:03,746 INFO L225 Difference]: With dead ends: 861 [2024-10-15 14:31:03,746 INFO L226 Difference]: Without dead ends: 567 [2024-10-15 14:31:03,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:31:03,752 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:03,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-10-15 14:31:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-10-15 14:31:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-10-15 14:31:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 644 transitions. [2024-10-15 14:31:04,032 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 644 transitions. Word has length 49 [2024-10-15 14:31:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:04,033 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 644 transitions. [2024-10-15 14:31:04,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:04,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 644 transitions. [2024-10-15 14:31:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:31:04,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:04,036 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:04,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-10-15 14:31:04,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-10-15 14:31:04,237 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:04,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash 794575845, now seen corresponding path program 61 times [2024-10-15 14:31:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:04,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45000832] [2024-10-15 14:31:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:04,338 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:04,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:04,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:04,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45000832] [2024-10-15 14:31:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45000832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438333452] [2024-10-15 14:31:04,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:31:04,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:04,742 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:04,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-10-15 14:31:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:04,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 14:31:04,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:05,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438333452] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:05,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 40 [2024-10-15 14:31:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207208884] [2024-10-15 14:31:05,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:05,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:31:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:31:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:31:05,154 INFO L87 Difference]: Start difference. First operand 567 states and 644 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:06,246 INFO L93 Difference]: Finished difference Result 657 states and 747 transitions. [2024-10-15 14:31:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 14:31:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-15 14:31:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:06,252 INFO L225 Difference]: With dead ends: 657 [2024-10-15 14:31:06,253 INFO L226 Difference]: Without dead ends: 651 [2024-10-15 14:31:06,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=1957, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:31:06,258 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 97 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:06,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 3026 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:31:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-10-15 14:31:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 581. [2024-10-15 14:31:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 497 states have (on average 1.1609657947686116) internal successors, (577), 547 states have internal predecessors, (577), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2024-10-15 14:31:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 661 transitions. [2024-10-15 14:31:06,519 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 661 transitions. Word has length 50 [2024-10-15 14:31:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:06,520 INFO L471 AbstractCegarLoop]: Abstraction has 581 states and 661 transitions. [2024-10-15 14:31:06,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:06,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 661 transitions. [2024-10-15 14:31:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:31:06,526 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:06,526 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:06,543 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:06,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:06,727 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:06,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1446674175, now seen corresponding path program 62 times [2024-10-15 14:31:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:06,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681804154] [2024-10-15 14:31:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:06,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:06,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681804154] [2024-10-15 14:31:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681804154] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422126234] [2024-10-15 14:31:07,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:07,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:07,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:07,342 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:07,343 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-10-15 14:31:07,444 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:07,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:07,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:31:07,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:07,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422126234] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:07,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:07,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 40 [2024-10-15 14:31:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213600950] [2024-10-15 14:31:07,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:07,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:31:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:31:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:31:07,835 INFO L87 Difference]: Start difference. First operand 581 states and 661 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:08,737 INFO L93 Difference]: Finished difference Result 587 states and 666 transitions. [2024-10-15 14:31:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:31:08,738 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-15 14:31:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:08,741 INFO L225 Difference]: With dead ends: 587 [2024-10-15 14:31:08,741 INFO L226 Difference]: Without dead ends: 567 [2024-10-15 14:31:08,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:31:08,745 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:08,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2521 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:31:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-10-15 14:31:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-10-15 14:31:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2024-10-15 14:31:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 645 transitions. [2024-10-15 14:31:08,950 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 645 transitions. Word has length 50 [2024-10-15 14:31:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:08,950 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 645 transitions. [2024-10-15 14:31:08,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:08,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 645 transitions. [2024-10-15 14:31:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:31:08,953 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:08,953 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:08,965 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-10-15 14:31:09,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:09,154 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:09,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -10438683, now seen corresponding path program 63 times [2024-10-15 14:31:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:09,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010055590] [2024-10-15 14:31:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:09,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010055590] [2024-10-15 14:31:09,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010055590] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:09,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223847522] [2024-10-15 14:31:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:09,575 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:09,576 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-10-15 14:31:09,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:31:09,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:09,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:31:09,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:09,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:10,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223847522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:10,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:10,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 40 [2024-10-15 14:31:10,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036053649] [2024-10-15 14:31:10,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:10,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:31:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:31:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:31:10,119 INFO L87 Difference]: Start difference. First operand 567 states and 645 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:10,865 INFO L93 Difference]: Finished difference Result 573 states and 650 transitions. [2024-10-15 14:31:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:31:10,866 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-15 14:31:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:10,868 INFO L225 Difference]: With dead ends: 573 [2024-10-15 14:31:10,868 INFO L226 Difference]: Without dead ends: 551 [2024-10-15 14:31:10,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:31:10,873 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:10,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1933 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:31:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-10-15 14:31:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2024-10-15 14:31:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 473 states have (on average 1.160676532769556) internal successors, (549), 519 states have internal predecessors, (549), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2024-10-15 14:31:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 627 transitions. [2024-10-15 14:31:11,065 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 627 transitions. Word has length 50 [2024-10-15 14:31:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:11,065 INFO L471 AbstractCegarLoop]: Abstraction has 551 states and 627 transitions. [2024-10-15 14:31:11,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:11,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 627 transitions. [2024-10-15 14:31:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:31:11,068 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:11,068 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:11,080 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-10-15 14:31:11,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-10-15 14:31:11,269 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:11,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1691124479, now seen corresponding path program 64 times [2024-10-15 14:31:11,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:11,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039159319] [2024-10-15 14:31:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:11,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039159319] [2024-10-15 14:31:11,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039159319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:11,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894120305] [2024-10-15 14:31:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:31:11,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:11,664 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-10-15 14:31:11,748 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:31:11,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:11,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:31:11,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:12,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:12,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894120305] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:12,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:12,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 40 [2024-10-15 14:31:12,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248967187] [2024-10-15 14:31:12,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:12,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:31:12,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:31:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:31:12,257 INFO L87 Difference]: Start difference. First operand 551 states and 627 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:12,878 INFO L93 Difference]: Finished difference Result 557 states and 632 transitions. [2024-10-15 14:31:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:31:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-15 14:31:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:12,881 INFO L225 Difference]: With dead ends: 557 [2024-10-15 14:31:12,881 INFO L226 Difference]: Without dead ends: 533 [2024-10-15 14:31:12,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:31:12,884 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:12,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1387 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:31:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-10-15 14:31:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2024-10-15 14:31:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 458 states have (on average 1.1615720524017468) internal successors, (532), 502 states have internal predecessors, (532), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2024-10-15 14:31:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 607 transitions. [2024-10-15 14:31:13,068 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 607 transitions. Word has length 50 [2024-10-15 14:31:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:13,069 INFO L471 AbstractCegarLoop]: Abstraction has 533 states and 607 transitions. [2024-10-15 14:31:13,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:13,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 607 transitions. [2024-10-15 14:31:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 14:31:13,071 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:13,071 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:13,083 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-10-15 14:31:13,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:13,272 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:13,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:13,272 INFO L85 PathProgramCache]: Analyzing trace with hash -695186459, now seen corresponding path program 65 times [2024-10-15 14:31:13,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:13,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400543826] [2024-10-15 14:31:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400543826] [2024-10-15 14:31:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400543826] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661515966] [2024-10-15 14:31:13,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:13,634 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:13,635 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-10-15 14:31:13,720 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-15 14:31:13,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:13,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:31:13,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:14,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661515966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:14,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-10-15 14:31:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919402655] [2024-10-15 14:31:14,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:14,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 14:31:14,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 14:31:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:31:14,177 INFO L87 Difference]: Start difference. First operand 533 states and 607 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:14,703 INFO L93 Difference]: Finished difference Result 549 states and 626 transitions. [2024-10-15 14:31:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:31:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-10-15 14:31:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:14,707 INFO L225 Difference]: With dead ends: 549 [2024-10-15 14:31:14,707 INFO L226 Difference]: Without dead ends: 543 [2024-10-15 14:31:14,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:31:14,710 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:14,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 836 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:31:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-10-15 14:31:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2024-10-15 14:31:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 463 states have (on average 1.16414686825054) internal successors, (539), 509 states have internal predecessors, (539), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2024-10-15 14:31:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 618 transitions. [2024-10-15 14:31:14,905 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 618 transitions. Word has length 50 [2024-10-15 14:31:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:14,906 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 618 transitions. [2024-10-15 14:31:14,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:14,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 618 transitions. [2024-10-15 14:31:14,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:31:14,908 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:14,908 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:14,920 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-10-15 14:31:15,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:15,109 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:15,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash -85333614, now seen corresponding path program 66 times [2024-10-15 14:31:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:15,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139979980] [2024-10-15 14:31:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139979980] [2024-10-15 14:31:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139979980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553648957] [2024-10-15 14:31:15,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:31:15,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:15,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:15,619 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:15,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-10-15 14:31:15,705 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-15 14:31:15,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:15,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 14:31:15,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:16,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553648957] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:17,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-10-15 14:31:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14222443] [2024-10-15 14:31:17,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:17,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-15 14:31:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-15 14:31:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-10-15 14:31:17,500 INFO L87 Difference]: Start difference. First operand 541 states and 618 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:19,223 INFO L93 Difference]: Finished difference Result 625 states and 719 transitions. [2024-10-15 14:31:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 14:31:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-10-15 14:31:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:19,230 INFO L225 Difference]: With dead ends: 625 [2024-10-15 14:31:19,230 INFO L226 Difference]: Without dead ends: 612 [2024-10-15 14:31:19,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-10-15 14:31:19,234 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:19,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 914 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:31:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-10-15 14:31:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2024-10-15 14:31:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 517 states have (on average 1.1624758220502902) internal successors, (601), 569 states have internal predecessors, (601), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2024-10-15 14:31:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 692 transitions. [2024-10-15 14:31:19,462 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 692 transitions. Word has length 51 [2024-10-15 14:31:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:19,462 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 692 transitions. [2024-10-15 14:31:19,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:19,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 692 transitions. [2024-10-15 14:31:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:31:19,468 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:19,468 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:19,486 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-10-15 14:31:19,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-10-15 14:31:19,669 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:19,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2059531173, now seen corresponding path program 67 times [2024-10-15 14:31:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525222359] [2024-10-15 14:31:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:19,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:19,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:19,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:20,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525222359] [2024-10-15 14:31:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525222359] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482977430] [2024-10-15 14:31:20,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:31:20,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:20,213 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:20,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-10-15 14:31:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:20,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 14:31:20,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:20,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:22,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482977430] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:22,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:22,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-10-15 14:31:22,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922305943] [2024-10-15 14:31:22,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:22,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-15 14:31:22,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-15 14:31:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-10-15 14:31:22,003 INFO L87 Difference]: Start difference. First operand 604 states and 692 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:23,713 INFO L93 Difference]: Finished difference Result 618 states and 706 transitions. [2024-10-15 14:31:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 14:31:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-10-15 14:31:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:23,717 INFO L225 Difference]: With dead ends: 618 [2024-10-15 14:31:23,717 INFO L226 Difference]: Without dead ends: 607 [2024-10-15 14:31:23,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-10-15 14:31:23,720 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:23,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1042 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:31:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-10-15 14:31:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2024-10-15 14:31:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 518 states have (on average 1.162162162162162) internal successors, (602), 570 states have internal predecessors, (602), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-10-15 14:31:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 689 transitions. [2024-10-15 14:31:24,053 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 689 transitions. Word has length 51 [2024-10-15 14:31:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:24,053 INFO L471 AbstractCegarLoop]: Abstraction has 605 states and 689 transitions. [2024-10-15 14:31:24,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:24,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 689 transitions. [2024-10-15 14:31:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:31:24,058 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:24,058 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:24,075 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-10-15 14:31:24,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-10-15 14:31:24,259 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:24,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -89209158, now seen corresponding path program 68 times [2024-10-15 14:31:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182019584] [2024-10-15 14:31:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:24,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:24,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182019584] [2024-10-15 14:31:24,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182019584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:24,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608812730] [2024-10-15 14:31:24,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:24,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:24,375 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:24,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-10-15 14:31:24,465 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:24,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:24,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-15 14:31:24,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:24,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:24,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608812730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:24,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:24,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-10-15 14:31:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784917109] [2024-10-15 14:31:24,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:24,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:31:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:31:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:31:24,610 INFO L87 Difference]: Start difference. First operand 605 states and 689 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:25,041 INFO L93 Difference]: Finished difference Result 1012 states and 1152 transitions. [2024-10-15 14:31:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 14:31:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-10-15 14:31:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:25,052 INFO L225 Difference]: With dead ends: 1012 [2024-10-15 14:31:25,052 INFO L226 Difference]: Without dead ends: 687 [2024-10-15 14:31:25,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:31:25,056 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:25,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 236 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-10-15 14:31:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2024-10-15 14:31:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 600 states have (on average 1.1583333333333334) internal successors, (695), 652 states have internal predecessors, (695), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-10-15 14:31:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 782 transitions. [2024-10-15 14:31:25,309 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 782 transitions. Word has length 51 [2024-10-15 14:31:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:25,309 INFO L471 AbstractCegarLoop]: Abstraction has 687 states and 782 transitions. [2024-10-15 14:31:25,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:25,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 782 transitions. [2024-10-15 14:31:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:31:25,312 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:25,312 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:25,325 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-10-15 14:31:25,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-10-15 14:31:25,513 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:25,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1053081969, now seen corresponding path program 69 times [2024-10-15 14:31:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:25,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790179658] [2024-10-15 14:31:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:25,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:25,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:25,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:25,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:25,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:25,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790179658] [2024-10-15 14:31:25,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790179658] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:25,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333437464] [2024-10-15 14:31:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:25,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:25,622 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:25,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-10-15 14:31:25,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:31:25,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:25,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-15 14:31:25,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:25,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-15 14:31:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333437464] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:25,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-10-15 14:31:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909648420] [2024-10-15 14:31:25,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:25,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:31:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:25,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:31:25,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-10-15 14:31:25,886 INFO L87 Difference]: Start difference. First operand 687 states and 782 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:26,361 INFO L93 Difference]: Finished difference Result 805 states and 931 transitions. [2024-10-15 14:31:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 14:31:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-10-15 14:31:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:26,365 INFO L225 Difference]: With dead ends: 805 [2024-10-15 14:31:26,365 INFO L226 Difference]: Without dead ends: 769 [2024-10-15 14:31:26,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:31:26,370 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:26,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 261 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-10-15 14:31:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-10-15 14:31:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-10-15 14:31:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 875 transitions. [2024-10-15 14:31:26,657 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 875 transitions. Word has length 51 [2024-10-15 14:31:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:26,657 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 875 transitions. [2024-10-15 14:31:26,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:26,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 875 transitions. [2024-10-15 14:31:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:26,661 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:26,661 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:26,673 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:26,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-10-15 14:31:26,862 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:26,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1631662044, now seen corresponding path program 70 times [2024-10-15 14:31:26,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:26,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300091533] [2024-10-15 14:31:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:26,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:26,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:26,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:27,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:27,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300091533] [2024-10-15 14:31:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300091533] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:27,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549276382] [2024-10-15 14:31:27,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:31:27,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:27,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:27,500 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:27,501 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-10-15 14:31:27,591 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:31:27,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:27,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-15 14:31:27,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:27,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:27,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549276382] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:27,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:27,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 42 [2024-10-15 14:31:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535194268] [2024-10-15 14:31:27,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:27,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:31:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:31:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:31:27,938 INFO L87 Difference]: Start difference. First operand 769 states and 875 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:29,096 INFO L93 Difference]: Finished difference Result 875 states and 996 transitions. [2024-10-15 14:31:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-15 14:31:29,097 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-15 14:31:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:29,102 INFO L225 Difference]: With dead ends: 875 [2024-10-15 14:31:29,102 INFO L226 Difference]: Without dead ends: 869 [2024-10-15 14:31:29,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:29,107 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 108 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:29,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 3459 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:31:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2024-10-15 14:31:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 783. [2024-10-15 14:31:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 693 states have (on average 1.155844155844156) internal successors, (801), 747 states have internal predecessors, (801), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2024-10-15 14:31:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 892 transitions. [2024-10-15 14:31:29,439 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 892 transitions. Word has length 52 [2024-10-15 14:31:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:29,439 INFO L471 AbstractCegarLoop]: Abstraction has 783 states and 892 transitions. [2024-10-15 14:31:29,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:29,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 892 transitions. [2024-10-15 14:31:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:29,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:29,444 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:29,456 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:29,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:29,644 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:29,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 722880988, now seen corresponding path program 71 times [2024-10-15 14:31:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865843917] [2024-10-15 14:31:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:29,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:29,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:29,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:30,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865843917] [2024-10-15 14:31:30,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865843917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:30,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394016] [2024-10-15 14:31:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:30,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:30,145 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:30,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-10-15 14:31:30,236 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:31:30,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:30,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-15 14:31:30,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:30,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:31:30,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394016] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:30,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:30,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2024-10-15 14:31:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553031435] [2024-10-15 14:31:30,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:30,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:31:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:31:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:31:30,567 INFO L87 Difference]: Start difference. First operand 783 states and 892 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:31,594 INFO L93 Difference]: Finished difference Result 789 states and 897 transitions. [2024-10-15 14:31:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 14:31:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-15 14:31:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:31,628 INFO L225 Difference]: With dead ends: 789 [2024-10-15 14:31:31,629 INFO L226 Difference]: Without dead ends: 769 [2024-10-15 14:31:31,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:31,633 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:31,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2954 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:31:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-10-15 14:31:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-10-15 14:31:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-10-15 14:31:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 876 transitions. [2024-10-15 14:31:31,927 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 876 transitions. Word has length 52 [2024-10-15 14:31:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:31,927 INFO L471 AbstractCegarLoop]: Abstraction has 769 states and 876 transitions. [2024-10-15 14:31:31,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:31,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 876 transitions. [2024-10-15 14:31:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:31,933 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:31,933 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:31,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-10-15 14:31:32,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:32,133 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:32,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash 996657116, now seen corresponding path program 72 times [2024-10-15 14:31:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887143598] [2024-10-15 14:31:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:32,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:32,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:32,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:32,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887143598] [2024-10-15 14:31:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887143598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558250518] [2024-10-15 14:31:32,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:31:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:32,590 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:32,590 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-10-15 14:31:32,681 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:31:32,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:32,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:31:32,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:32,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:31:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558250518] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:33,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:33,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 42 [2024-10-15 14:31:33,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445310424] [2024-10-15 14:31:33,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:33,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:31:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:31:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1623, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:31:33,104 INFO L87 Difference]: Start difference. First operand 769 states and 876 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:34,013 INFO L93 Difference]: Finished difference Result 775 states and 881 transitions. [2024-10-15 14:31:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:31:34,014 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-15 14:31:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:34,018 INFO L225 Difference]: With dead ends: 775 [2024-10-15 14:31:34,019 INFO L226 Difference]: Without dead ends: 753 [2024-10-15 14:31:34,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:34,023 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:34,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2189 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:31:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-10-15 14:31:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2024-10-15 14:31:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 669 states have (on average 1.155455904334828) internal successors, (773), 719 states have internal predecessors, (773), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2024-10-15 14:31:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 858 transitions. [2024-10-15 14:31:34,314 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 858 transitions. Word has length 52 [2024-10-15 14:31:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:34,314 INFO L471 AbstractCegarLoop]: Abstraction has 753 states and 858 transitions. [2024-10-15 14:31:34,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:34,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 858 transitions. [2024-10-15 14:31:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:34,318 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:34,319 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:34,331 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-10-15 14:31:34,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:34,519 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:34,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1811395036, now seen corresponding path program 73 times [2024-10-15 14:31:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679286967] [2024-10-15 14:31:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:34,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:34,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:34,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679286967] [2024-10-15 14:31:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679286967] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130754538] [2024-10-15 14:31:34,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:31:34,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:34,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:34,996 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:34,997 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-10-15 14:31:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:35,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:31:35,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:35,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:31:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130754538] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:35,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:35,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 42 [2024-10-15 14:31:35,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862614045] [2024-10-15 14:31:35,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:35,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:31:35,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:31:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:31:35,584 INFO L87 Difference]: Start difference. First operand 753 states and 858 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:36,427 INFO L93 Difference]: Finished difference Result 759 states and 863 transitions. [2024-10-15 14:31:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:31:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-15 14:31:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:36,432 INFO L225 Difference]: With dead ends: 759 [2024-10-15 14:31:36,432 INFO L226 Difference]: Without dead ends: 735 [2024-10-15 14:31:36,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:36,436 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:36,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1521 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:31:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-10-15 14:31:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2024-10-15 14:31:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 654 states have (on average 1.1559633027522935) internal successors, (756), 702 states have internal predecessors, (756), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2024-10-15 14:31:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 838 transitions. [2024-10-15 14:31:36,779 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 838 transitions. Word has length 52 [2024-10-15 14:31:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:36,779 INFO L471 AbstractCegarLoop]: Abstraction has 735 states and 838 transitions. [2024-10-15 14:31:36,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:36,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 838 transitions. [2024-10-15 14:31:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:36,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:36,783 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:36,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:36,984 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:36,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1405283885, now seen corresponding path program 74 times [2024-10-15 14:31:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419694543] [2024-10-15 14:31:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:37,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:37,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:37,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-15 14:31:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:31:37,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419694543] [2024-10-15 14:31:37,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419694543] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368620507] [2024-10-15 14:31:37,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:37,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:37,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:37,336 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:37,337 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-10-15 14:31:37,427 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:37,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:37,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 14:31:37,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-15 14:31:37,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-15 14:31:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368620507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:38,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:38,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-10-15 14:31:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402615197] [2024-10-15 14:31:38,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:38,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:31:38,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:31:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:31:38,244 INFO L87 Difference]: Start difference. First operand 735 states and 838 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:39,102 INFO L93 Difference]: Finished difference Result 803 states and 924 transitions. [2024-10-15 14:31:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:31:39,103 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-10-15 14:31:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:39,117 INFO L225 Difference]: With dead ends: 803 [2024-10-15 14:31:39,117 INFO L226 Difference]: Without dead ends: 786 [2024-10-15 14:31:39,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-10-15 14:31:39,122 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:39,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 634 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:31:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-10-15 14:31:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 782. [2024-10-15 14:31:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 674 states have (on average 1.1498516320474776) internal successors, (775), 740 states have internal predecessors, (775), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-10-15 14:31:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 893 transitions. [2024-10-15 14:31:39,483 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 893 transitions. Word has length 52 [2024-10-15 14:31:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:39,484 INFO L471 AbstractCegarLoop]: Abstraction has 782 states and 893 transitions. [2024-10-15 14:31:39,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:39,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 893 transitions. [2024-10-15 14:31:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:39,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:39,489 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:39,500 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-10-15 14:31:39,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:39,689 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:39,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 635330524, now seen corresponding path program 75 times [2024-10-15 14:31:39,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:39,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43344576] [2024-10-15 14:31:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:39,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:39,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:39,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:39,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:40,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43344576] [2024-10-15 14:31:40,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43344576] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:40,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743430064] [2024-10-15 14:31:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:40,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:40,090 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:40,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-10-15 14:31:40,183 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:31:40,183 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:40,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:31:40,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:40,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:31:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743430064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:40,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:40,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2024-10-15 14:31:40,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889584870] [2024-10-15 14:31:40,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:40,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-15 14:31:40,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:40,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-15 14:31:40,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:31:40,669 INFO L87 Difference]: Start difference. First operand 782 states and 893 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:41,373 INFO L93 Difference]: Finished difference Result 798 states and 913 transitions. [2024-10-15 14:31:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:31:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-10-15 14:31:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:41,380 INFO L225 Difference]: With dead ends: 798 [2024-10-15 14:31:41,380 INFO L226 Difference]: Without dead ends: 781 [2024-10-15 14:31:41,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:31:41,386 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:41,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1129 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:31:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2024-10-15 14:31:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 777. [2024-10-15 14:31:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 669 states have (on average 1.1524663677130045) internal successors, (771), 735 states have internal predecessors, (771), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-10-15 14:31:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 889 transitions. [2024-10-15 14:31:41,725 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 889 transitions. Word has length 52 [2024-10-15 14:31:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:41,725 INFO L471 AbstractCegarLoop]: Abstraction has 777 states and 889 transitions. [2024-10-15 14:31:41,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:41,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 889 transitions. [2024-10-15 14:31:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-15 14:31:41,731 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:41,731 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:41,743 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-10-15 14:31:41,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:41,931 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:41,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -882558989, now seen corresponding path program 76 times [2024-10-15 14:31:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:41,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784818399] [2024-10-15 14:31:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:41,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:41,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:42,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:31:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:31:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784818399] [2024-10-15 14:31:42,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784818399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724774591] [2024-10-15 14:31:42,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:31:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:42,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:42,284 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:42,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-10-15 14:31:42,373 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:31:42,373 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:42,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-15 14:31:42,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-15 14:31:42,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-15 14:31:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724774591] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:43,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:43,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-10-15 14:31:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125980253] [2024-10-15 14:31:43,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:43,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:31:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:31:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:31:43,198 INFO L87 Difference]: Start difference. First operand 777 states and 889 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:44,105 INFO L93 Difference]: Finished difference Result 789 states and 900 transitions. [2024-10-15 14:31:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:31:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-10-15 14:31:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:44,111 INFO L225 Difference]: With dead ends: 789 [2024-10-15 14:31:44,111 INFO L226 Difference]: Without dead ends: 765 [2024-10-15 14:31:44,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-10-15 14:31:44,118 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:44,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 626 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:31:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2024-10-15 14:31:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 763. [2024-10-15 14:31:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 655 states have (on average 1.1526717557251909) internal successors, (755), 721 states have internal predecessors, (755), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2024-10-15 14:31:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 865 transitions. [2024-10-15 14:31:44,477 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 865 transitions. Word has length 52 [2024-10-15 14:31:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:44,478 INFO L471 AbstractCegarLoop]: Abstraction has 763 states and 865 transitions. [2024-10-15 14:31:44,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:44,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 865 transitions. [2024-10-15 14:31:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 14:31:44,483 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:44,483 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:44,503 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-10-15 14:31:44,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-10-15 14:31:44,684 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:44,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 94534779, now seen corresponding path program 77 times [2024-10-15 14:31:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551698555] [2024-10-15 14:31:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:44,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:44,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:44,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:45,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:45,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551698555] [2024-10-15 14:31:45,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551698555] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:45,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519569014] [2024-10-15 14:31:45,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:31:45,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:45,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:45,347 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:45,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-10-15 14:31:45,457 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:31:45,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:45,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-15 14:31:45,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:46,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:47,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519569014] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:47,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:47,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-10-15 14:31:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644150257] [2024-10-15 14:31:47,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:47,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-10-15 14:31:47,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-10-15 14:31:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-10-15 14:31:47,459 INFO L87 Difference]: Start difference. First operand 763 states and 865 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:49,542 INFO L93 Difference]: Finished difference Result 869 states and 992 transitions. [2024-10-15 14:31:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 14:31:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-10-15 14:31:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:49,555 INFO L225 Difference]: With dead ends: 869 [2024-10-15 14:31:49,555 INFO L226 Difference]: Without dead ends: 856 [2024-10-15 14:31:49,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-10-15 14:31:49,562 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:49,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 985 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:31:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-10-15 14:31:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 848. [2024-10-15 14:31:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 728 states have (on average 1.151098901098901) internal successors, (838), 802 states have internal predecessors, (838), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2024-10-15 14:31:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 964 transitions. [2024-10-15 14:31:50,135 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 964 transitions. Word has length 53 [2024-10-15 14:31:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:50,135 INFO L471 AbstractCegarLoop]: Abstraction has 848 states and 964 transitions. [2024-10-15 14:31:50,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:50,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 964 transitions. [2024-10-15 14:31:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 14:31:50,143 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:50,143 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:50,155 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-10-15 14:31:50,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:50,343 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:50,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -976047406, now seen corresponding path program 78 times [2024-10-15 14:31:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:50,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746852726] [2024-10-15 14:31:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:31:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:50,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746852726] [2024-10-15 14:31:50,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746852726] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051526146] [2024-10-15 14:31:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:31:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:50,884 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:50,885 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-10-15 14:31:50,983 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-15 14:31:50,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:50,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-15 14:31:50,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:51,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:31:52,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051526146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:52,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:52,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-10-15 14:31:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850018950] [2024-10-15 14:31:52,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:52,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-10-15 14:31:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-10-15 14:31:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-10-15 14:31:52,934 INFO L87 Difference]: Start difference. First operand 848 states and 964 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:55,245 INFO L93 Difference]: Finished difference Result 862 states and 978 transitions. [2024-10-15 14:31:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 14:31:55,245 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-10-15 14:31:55,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:55,250 INFO L225 Difference]: With dead ends: 862 [2024-10-15 14:31:55,250 INFO L226 Difference]: Without dead ends: 851 [2024-10-15 14:31:55,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-10-15 14:31:55,257 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:55,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1380 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:31:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-10-15 14:31:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 849. [2024-10-15 14:31:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 729 states have (on average 1.1508916323731138) internal successors, (839), 803 states have internal predecessors, (839), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-10-15 14:31:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 960 transitions. [2024-10-15 14:31:55,612 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 960 transitions. Word has length 53 [2024-10-15 14:31:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:55,612 INFO L471 AbstractCegarLoop]: Abstraction has 849 states and 960 transitions. [2024-10-15 14:31:55,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:31:55,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 960 transitions. [2024-10-15 14:31:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 14:31:55,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:55,618 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:55,630 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:55,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:55,819 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:55,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 205782261, now seen corresponding path program 79 times [2024-10-15 14:31:55,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:55,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639644630] [2024-10-15 14:31:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:55,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:55,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:55,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:31:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:55,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639644630] [2024-10-15 14:31:55,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639644630] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786933625] [2024-10-15 14:31:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:31:55,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:55,941 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:55,942 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-10-15 14:31:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:56,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:31:56,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:56,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786933625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:56,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-10-15 14:31:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274746378] [2024-10-15 14:31:56,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:56,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:31:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:31:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:31:56,210 INFO L87 Difference]: Start difference. First operand 849 states and 960 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:56,772 INFO L93 Difference]: Finished difference Result 882 states and 1001 transitions. [2024-10-15 14:31:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:31:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-10-15 14:31:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:56,777 INFO L225 Difference]: With dead ends: 882 [2024-10-15 14:31:56,777 INFO L226 Difference]: Without dead ends: 854 [2024-10-15 14:31:56,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:31:56,784 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:56,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:31:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2024-10-15 14:31:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 844. [2024-10-15 14:31:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 730 states have (on average 1.1452054794520548) internal successors, (836), 800 states have internal predecessors, (836), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-10-15 14:31:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 949 transitions. [2024-10-15 14:31:57,139 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 949 transitions. Word has length 53 [2024-10-15 14:31:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:57,139 INFO L471 AbstractCegarLoop]: Abstraction has 844 states and 949 transitions. [2024-10-15 14:31:57,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:31:57,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 949 transitions. [2024-10-15 14:31:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 14:31:57,144 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:57,144 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:57,156 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:57,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:57,345 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:57,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -229324870, now seen corresponding path program 80 times [2024-10-15 14:31:57,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:57,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260552523] [2024-10-15 14:31:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:57,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:57,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:57,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 14:31:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:57,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260552523] [2024-10-15 14:31:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260552523] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350646757] [2024-10-15 14:31:57,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:31:57,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:57,468 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:57,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-10-15 14:31:57,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:31:57,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:57,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:31:57,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:57,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:31:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350646757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:57,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-10-15 14:31:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168775472] [2024-10-15 14:31:57,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:57,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:31:57,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:31:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:31:57,749 INFO L87 Difference]: Start difference. First operand 844 states and 949 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:31:58,314 INFO L93 Difference]: Finished difference Result 1290 states and 1433 transitions. [2024-10-15 14:31:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:31:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-10-15 14:31:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:31:58,330 INFO L225 Difference]: With dead ends: 1290 [2024-10-15 14:31:58,330 INFO L226 Difference]: Without dead ends: 855 [2024-10-15 14:31:58,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 14:31:58,339 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:31:58,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 204 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:31:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-10-15 14:31:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-10-15 14:31:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-10-15 14:31:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 960 transitions. [2024-10-15 14:31:58,707 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 960 transitions. Word has length 53 [2024-10-15 14:31:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:31:58,707 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 960 transitions. [2024-10-15 14:31:58,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:31:58,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 960 transitions. [2024-10-15 14:31:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:31:58,716 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:31:58,716 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:31:58,735 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-10-15 14:31:58,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:58,917 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:31:58,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:31:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash 859920453, now seen corresponding path program 81 times [2024-10-15 14:31:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:31:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742400956] [2024-10-15 14:31:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:31:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:31:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:59,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:31:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:59,035 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:31:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:59,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:31:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:31:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:59,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:31:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742400956] [2024-10-15 14:31:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742400956] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:31:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473265641] [2024-10-15 14:31:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:31:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:31:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:31:59,538 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:31:59,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-10-15 14:31:59,639 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-15 14:31:59,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:31:59,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:31:59,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:31:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:59,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:31:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:31:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473265641] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:31:59,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:31:59,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 44 [2024-10-15 14:31:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857457968] [2024-10-15 14:31:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:31:59,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:31:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:31:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:31:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:31:59,995 INFO L87 Difference]: Start difference. First operand 855 states and 960 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:01,371 INFO L93 Difference]: Finished difference Result 967 states and 1087 transitions. [2024-10-15 14:32:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-15 14:32:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:01,378 INFO L225 Difference]: With dead ends: 967 [2024-10-15 14:32:01,379 INFO L226 Difference]: Without dead ends: 961 [2024-10-15 14:32:01,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:01,387 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:01,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3984 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:32:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-10-15 14:32:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 869. [2024-10-15 14:32:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 752 states have (on average 1.1436170212765957) internal successors, (860), 824 states have internal predecessors, (860), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2024-10-15 14:32:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 977 transitions. [2024-10-15 14:32:01,755 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 977 transitions. Word has length 54 [2024-10-15 14:32:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:01,755 INFO L471 AbstractCegarLoop]: Abstraction has 869 states and 977 transitions. [2024-10-15 14:32:01,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:01,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 977 transitions. [2024-10-15 14:32:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:32:01,764 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:01,764 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:01,782 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:01,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:01,965 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:01,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1993786783, now seen corresponding path program 82 times [2024-10-15 14:32:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296983420] [2024-10-15 14:32:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:02,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:02,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:02,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:02,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296983420] [2024-10-15 14:32:02,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296983420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:02,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261215370] [2024-10-15 14:32:02,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:32:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:02,567 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:02,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-10-15 14:32:02,667 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:32:02,667 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:02,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-15 14:32:02,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:02,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:03,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261215370] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:03,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:03,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 44 [2024-10-15 14:32:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824894967] [2024-10-15 14:32:03,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:03,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:32:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:32:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:32:03,085 INFO L87 Difference]: Start difference. First operand 869 states and 977 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:04,252 INFO L93 Difference]: Finished difference Result 875 states and 982 transitions. [2024-10-15 14:32:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-15 14:32:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:04,257 INFO L225 Difference]: With dead ends: 875 [2024-10-15 14:32:04,257 INFO L226 Difference]: Without dead ends: 855 [2024-10-15 14:32:04,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2325, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:04,268 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 96 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:04,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3320 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:32:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-10-15 14:32:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-10-15 14:32:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2024-10-15 14:32:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 961 transitions. [2024-10-15 14:32:04,685 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 961 transitions. Word has length 54 [2024-10-15 14:32:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:04,685 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 961 transitions. [2024-10-15 14:32:04,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:04,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 961 transitions. [2024-10-15 14:32:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:32:04,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:04,691 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:04,703 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:04,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:04,892 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:04,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1858550853, now seen corresponding path program 83 times [2024-10-15 14:32:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000844422] [2024-10-15 14:32:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:05,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:05,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:05,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:05,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:05,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000844422] [2024-10-15 14:32:05,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000844422] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:05,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49028837] [2024-10-15 14:32:05,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:32:05,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:05,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:05,512 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:05,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-10-15 14:32:05,613 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:32:05,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:05,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 14:32:05,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:05,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49028837] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:06,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 44 [2024-10-15 14:32:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441818064] [2024-10-15 14:32:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:06,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:32:06,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:32:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:32:06,051 INFO L87 Difference]: Start difference. First operand 855 states and 961 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:07,071 INFO L93 Difference]: Finished difference Result 861 states and 966 transitions. [2024-10-15 14:32:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 14:32:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:07,077 INFO L225 Difference]: With dead ends: 861 [2024-10-15 14:32:07,077 INFO L226 Difference]: Without dead ends: 839 [2024-10-15 14:32:07,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=2321, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:07,083 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:07,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2581 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:32:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-10-15 14:32:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2024-10-15 14:32:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 728 states have (on average 1.1428571428571428) internal successors, (832), 796 states have internal predecessors, (832), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2024-10-15 14:32:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 943 transitions. [2024-10-15 14:32:07,489 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 943 transitions. Word has length 54 [2024-10-15 14:32:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:07,489 INFO L471 AbstractCegarLoop]: Abstraction has 839 states and 943 transitions. [2024-10-15 14:32:07,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:07,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 943 transitions. [2024-10-15 14:32:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:32:07,494 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:07,495 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:07,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:07,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:07,695 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:07,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -295057823, now seen corresponding path program 84 times [2024-10-15 14:32:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400406689] [2024-10-15 14:32:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:07,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:07,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:07,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400406689] [2024-10-15 14:32:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400406689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184767313] [2024-10-15 14:32:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:32:08,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:08,179 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:08,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-10-15 14:32:08,279 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:32:08,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:08,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:32:08,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:08,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184767313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:08,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:08,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 44 [2024-10-15 14:32:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517346599] [2024-10-15 14:32:08,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:08,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:32:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:08,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:32:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:32:08,758 INFO L87 Difference]: Start difference. First operand 839 states and 943 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:09,671 INFO L93 Difference]: Finished difference Result 845 states and 948 transitions. [2024-10-15 14:32:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:32:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:09,676 INFO L225 Difference]: With dead ends: 845 [2024-10-15 14:32:09,676 INFO L226 Difference]: Without dead ends: 821 [2024-10-15 14:32:09,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:09,682 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 56 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:09,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2048 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:32:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2024-10-15 14:32:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2024-10-15 14:32:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 713 states have (on average 1.1430575035063113) internal successors, (815), 779 states have internal predecessors, (815), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2024-10-15 14:32:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 923 transitions. [2024-10-15 14:32:10,074 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 923 transitions. Word has length 54 [2024-10-15 14:32:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:10,074 INFO L471 AbstractCegarLoop]: Abstraction has 821 states and 923 transitions. [2024-10-15 14:32:10,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:10,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 923 transitions. [2024-10-15 14:32:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:32:10,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:10,079 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:10,091 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-10-15 14:32:10,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:10,280 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:10,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:10,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1620066373, now seen corresponding path program 85 times [2024-10-15 14:32:10,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:10,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851535189] [2024-10-15 14:32:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:10,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:10,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:10,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851535189] [2024-10-15 14:32:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851535189] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105889964] [2024-10-15 14:32:10,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:32:10,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:10,721 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:10,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-10-15 14:32:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:10,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:32:10,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:11,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105889964] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:11,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 44 [2024-10-15 14:32:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051249384] [2024-10-15 14:32:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:11,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:32:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:11,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:32:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:32:11,338 INFO L87 Difference]: Start difference. First operand 821 states and 923 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:12,172 INFO L93 Difference]: Finished difference Result 827 states and 928 transitions. [2024-10-15 14:32:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:32:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:12,177 INFO L225 Difference]: With dead ends: 827 [2024-10-15 14:32:12,177 INFO L226 Difference]: Without dead ends: 801 [2024-10-15 14:32:12,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:12,185 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:12,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1474 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:32:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-10-15 14:32:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2024-10-15 14:32:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 696 states have (on average 1.1436781609195403) internal successors, (796), 760 states have internal predecessors, (796), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2024-10-15 14:32:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 901 transitions. [2024-10-15 14:32:12,546 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 901 transitions. Word has length 54 [2024-10-15 14:32:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:12,546 INFO L471 AbstractCegarLoop]: Abstraction has 801 states and 901 transitions. [2024-10-15 14:32:12,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:12,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 901 transitions. [2024-10-15 14:32:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 14:32:12,551 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:12,551 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:12,563 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-10-15 14:32:12,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:12,751 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:12,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:12,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1081658783, now seen corresponding path program 86 times [2024-10-15 14:32:12,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:12,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910651996] [2024-10-15 14:32:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:12,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:12,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:12,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:12,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:13,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910651996] [2024-10-15 14:32:13,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910651996] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529692838] [2024-10-15 14:32:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:32:13,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:13,156 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:13,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-10-15 14:32:13,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:32:13,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:13,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-15 14:32:13,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:13,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529692838] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:13,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2024-10-15 14:32:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603965995] [2024-10-15 14:32:13,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:13,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-15 14:32:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-15 14:32:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:32:13,793 INFO L87 Difference]: Start difference. First operand 801 states and 901 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:14,499 INFO L93 Difference]: Finished difference Result 817 states and 920 transitions. [2024-10-15 14:32:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:32:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-10-15 14:32:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:14,507 INFO L225 Difference]: With dead ends: 817 [2024-10-15 14:32:14,507 INFO L226 Difference]: Without dead ends: 811 [2024-10-15 14:32:14,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:14,513 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:14,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 810 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:32:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2024-10-15 14:32:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 809. [2024-10-15 14:32:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 701 states have (on average 1.145506419400856) internal successors, (803), 767 states have internal predecessors, (803), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2024-10-15 14:32:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 912 transitions. [2024-10-15 14:32:14,862 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 912 transitions. Word has length 54 [2024-10-15 14:32:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:14,862 INFO L471 AbstractCegarLoop]: Abstraction has 809 states and 912 transitions. [2024-10-15 14:32:14,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:14,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 912 transitions. [2024-10-15 14:32:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:32:14,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:14,867 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:14,879 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:15,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2024-10-15 14:32:15,067 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:15,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1940349234, now seen corresponding path program 87 times [2024-10-15 14:32:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:15,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953314129] [2024-10-15 14:32:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:15,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:15,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:15,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:15,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:15,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:15,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953314129] [2024-10-15 14:32:15,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953314129] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:15,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855632562] [2024-10-15 14:32:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:32:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:15,661 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:15,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-10-15 14:32:15,764 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-15 14:32:15,765 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:15,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-15 14:32:15,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:16,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:18,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855632562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:18,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:18,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-10-15 14:32:18,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328486552] [2024-10-15 14:32:18,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:18,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-10-15 14:32:18,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-10-15 14:32:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-10-15 14:32:18,092 INFO L87 Difference]: Start difference. First operand 809 states and 912 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:20,592 INFO L93 Difference]: Finished difference Result 917 states and 1041 transitions. [2024-10-15 14:32:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:32:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-10-15 14:32:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:20,607 INFO L225 Difference]: With dead ends: 917 [2024-10-15 14:32:20,607 INFO L226 Difference]: Without dead ends: 904 [2024-10-15 14:32:20,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-10-15 14:32:20,616 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:20,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1008 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:32:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-10-15 14:32:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2024-10-15 14:32:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 776 states have (on average 1.1443298969072164) internal successors, (888), 850 states have internal predecessors, (888), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2024-10-15 14:32:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1013 transitions. [2024-10-15 14:32:21,113 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1013 transitions. Word has length 55 [2024-10-15 14:32:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:21,113 INFO L471 AbstractCegarLoop]: Abstraction has 896 states and 1013 transitions. [2024-10-15 14:32:21,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:21,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1013 transitions. [2024-10-15 14:32:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:32:21,119 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:21,119 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:21,131 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:21,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-10-15 14:32:21,319 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:21,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1182927429, now seen corresponding path program 88 times [2024-10-15 14:32:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870926458] [2024-10-15 14:32:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:21,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:21,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:21,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:21,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:21,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870926458] [2024-10-15 14:32:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870926458] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:21,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738598234] [2024-10-15 14:32:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:32:21,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:21,914 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:21,915 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-10-15 14:32:22,020 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:32:22,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:22,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-15 14:32:22,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:22,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738598234] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:24,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-10-15 14:32:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736783696] [2024-10-15 14:32:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:24,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-10-15 14:32:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-10-15 14:32:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-10-15 14:32:24,371 INFO L87 Difference]: Start difference. First operand 896 states and 1013 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:26,965 INFO L93 Difference]: Finished difference Result 910 states and 1027 transitions. [2024-10-15 14:32:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:32:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-10-15 14:32:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:26,970 INFO L225 Difference]: With dead ends: 910 [2024-10-15 14:32:26,970 INFO L226 Difference]: Without dead ends: 899 [2024-10-15 14:32:26,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-10-15 14:32:26,978 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:26,978 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1256 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:32:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-10-15 14:32:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2024-10-15 14:32:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 777 states have (on average 1.1441441441441442) internal successors, (889), 851 states have internal predecessors, (889), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-10-15 14:32:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1009 transitions. [2024-10-15 14:32:27,391 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1009 transitions. Word has length 55 [2024-10-15 14:32:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:27,391 INFO L471 AbstractCegarLoop]: Abstraction has 897 states and 1009 transitions. [2024-10-15 14:32:27,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:27,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1009 transitions. [2024-10-15 14:32:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:32:27,397 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:27,397 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:27,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-10-15 14:32:27,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:27,598 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:27,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1734206310, now seen corresponding path program 89 times [2024-10-15 14:32:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:27,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248861864] [2024-10-15 14:32:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:27,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:27,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:27,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248861864] [2024-10-15 14:32:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248861864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857840188] [2024-10-15 14:32:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:32:27,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:27,778 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:27,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-10-15 14:32:27,886 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:32:27,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:27,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:32:27,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:27,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857840188] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:28,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-10-15 14:32:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658817527] [2024-10-15 14:32:28,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:28,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:32:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:32:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:32:28,069 INFO L87 Difference]: Start difference. First operand 897 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:28,805 INFO L93 Difference]: Finished difference Result 1477 states and 1656 transitions. [2024-10-15 14:32:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-15 14:32:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-10-15 14:32:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:28,830 INFO L225 Difference]: With dead ends: 1477 [2024-10-15 14:32:28,830 INFO L226 Difference]: Without dead ends: 1007 [2024-10-15 14:32:28,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 14:32:28,841 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:28,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 306 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:32:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-10-15 14:32:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2024-10-15 14:32:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 887 states have (on average 1.1409244644870349) internal successors, (1012), 961 states have internal predecessors, (1012), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-10-15 14:32:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1132 transitions. [2024-10-15 14:32:29,368 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1132 transitions. Word has length 55 [2024-10-15 14:32:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:29,368 INFO L471 AbstractCegarLoop]: Abstraction has 1007 states and 1132 transitions. [2024-10-15 14:32:29,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:29,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1132 transitions. [2024-10-15 14:32:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:32:29,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:29,374 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:29,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-10-15 14:32:29,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:29,575 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:29,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1957341813, now seen corresponding path program 90 times [2024-10-15 14:32:29,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:29,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845838942] [2024-10-15 14:32:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:29,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:29,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:29,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:29,623 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845838942] [2024-10-15 14:32:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845838942] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499092542] [2024-10-15 14:32:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:32:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:29,717 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:29,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-10-15 14:32:29,825 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:32:29,826 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:29,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:32:29,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:29,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-15 14:32:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499092542] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:30,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:30,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-10-15 14:32:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359428230] [2024-10-15 14:32:30,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:30,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:32:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:32:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:32:30,012 INFO L87 Difference]: Start difference. First operand 1007 states and 1132 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:32:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:30,744 INFO L93 Difference]: Finished difference Result 1159 states and 1321 transitions. [2024-10-15 14:32:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-15 14:32:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2024-10-15 14:32:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:30,751 INFO L225 Difference]: With dead ends: 1159 [2024-10-15 14:32:30,751 INFO L226 Difference]: Without dead ends: 1117 [2024-10-15 14:32:30,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 14:32:30,761 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:30,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:32:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-10-15 14:32:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-10-15 14:32:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-10-15 14:32:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1255 transitions. [2024-10-15 14:32:31,336 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1255 transitions. Word has length 55 [2024-10-15 14:32:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:31,336 INFO L471 AbstractCegarLoop]: Abstraction has 1117 states and 1255 transitions. [2024-10-15 14:32:31,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:32:31,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1255 transitions. [2024-10-15 14:32:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:31,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:31,343 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:31,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:31,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:31,544 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:31,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1258392964, now seen corresponding path program 91 times [2024-10-15 14:32:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:31,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461505111] [2024-10-15 14:32:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:31,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:31,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:31,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:31,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:32:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:32,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461505111] [2024-10-15 14:32:32,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461505111] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:32,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834317370] [2024-10-15 14:32:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:32:32,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:32,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:32,236 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:32,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-10-15 14:32:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:32,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-15 14:32:32,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:32:32,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:32:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834317370] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:32,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 46 [2024-10-15 14:32:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814319634] [2024-10-15 14:32:32,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:32,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:32,728 INFO L87 Difference]: Start difference. First operand 1117 states and 1255 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:34,647 INFO L93 Difference]: Finished difference Result 1247 states and 1402 transitions. [2024-10-15 14:32:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:32:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:34,657 INFO L225 Difference]: With dead ends: 1247 [2024-10-15 14:32:34,657 INFO L226 Difference]: Without dead ends: 1241 [2024-10-15 14:32:34,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:34,667 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 128 mSDsluCounter, 4344 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:34,667 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 4461 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:32:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2024-10-15 14:32:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1131. [2024-10-15 14:32:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1008 states have (on average 1.1388888888888888) internal successors, (1148), 1084 states have internal predecessors, (1148), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2024-10-15 14:32:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1272 transitions. [2024-10-15 14:32:35,274 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1272 transitions. Word has length 56 [2024-10-15 14:32:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:35,275 INFO L471 AbstractCegarLoop]: Abstraction has 1131 states and 1272 transitions. [2024-10-15 14:32:35,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:35,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1272 transitions. [2024-10-15 14:32:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:35,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:35,283 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:35,295 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:35,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-10-15 14:32:35,483 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:35,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2056222844, now seen corresponding path program 92 times [2024-10-15 14:32:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:35,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673345704] [2024-10-15 14:32:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:35,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:35,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:35,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673345704] [2024-10-15 14:32:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673345704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534705552] [2024-10-15 14:32:36,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:32:36,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:36,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:36,120 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:36,121 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-10-15 14:32:36,228 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:32:36,228 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:36,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:32:36,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:36,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:32:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534705552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:36,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:36,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 46 [2024-10-15 14:32:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642137307] [2024-10-15 14:32:36,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:36,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:36,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:36,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1967, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:36,649 INFO L87 Difference]: Start difference. First operand 1131 states and 1272 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:38,090 INFO L93 Difference]: Finished difference Result 1137 states and 1277 transitions. [2024-10-15 14:32:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-15 14:32:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:38,096 INFO L225 Difference]: With dead ends: 1137 [2024-10-15 14:32:38,096 INFO L226 Difference]: Without dead ends: 1117 [2024-10-15 14:32:38,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:38,106 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:38,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3823 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:32:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-10-15 14:32:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-10-15 14:32:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-10-15 14:32:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1256 transitions. [2024-10-15 14:32:38,698 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1256 transitions. Word has length 56 [2024-10-15 14:32:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:38,698 INFO L471 AbstractCegarLoop]: Abstraction has 1117 states and 1256 transitions. [2024-10-15 14:32:38,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:38,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1256 transitions. [2024-10-15 14:32:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:38,706 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:38,706 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:38,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-10-15 14:32:38,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-10-15 14:32:38,907 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:38,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 114260604, now seen corresponding path program 93 times [2024-10-15 14:32:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:38,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405502356] [2024-10-15 14:32:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:39,024 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:39,025 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:39,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:39,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405502356] [2024-10-15 14:32:39,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405502356] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206952887] [2024-10-15 14:32:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:32:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:39,478 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:39,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-10-15 14:32:39,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:32:39,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:39,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-15 14:32:39,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:39,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:32:40,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206952887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:40,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:40,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 46 [2024-10-15 14:32:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630676403] [2024-10-15 14:32:40,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:40,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1963, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:40,069 INFO L87 Difference]: Start difference. First operand 1117 states and 1256 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:41,423 INFO L93 Difference]: Finished difference Result 1123 states and 1261 transitions. [2024-10-15 14:32:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-15 14:32:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:41,428 INFO L225 Difference]: With dead ends: 1123 [2024-10-15 14:32:41,428 INFO L226 Difference]: Without dead ends: 1101 [2024-10-15 14:32:41,437 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:41,437 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:41,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3109 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:32:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-10-15 14:32:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-10-15 14:32:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 984 states have (on average 1.1382113821138211) internal successors, (1120), 1056 states have internal predecessors, (1120), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2024-10-15 14:32:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1238 transitions. [2024-10-15 14:32:41,951 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1238 transitions. Word has length 56 [2024-10-15 14:32:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:41,951 INFO L471 AbstractCegarLoop]: Abstraction has 1101 states and 1238 transitions. [2024-10-15 14:32:41,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:41,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1238 transitions. [2024-10-15 14:32:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:41,962 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:41,962 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:41,977 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2024-10-15 14:32:42,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-10-15 14:32:42,163 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:42,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 129396860, now seen corresponding path program 94 times [2024-10-15 14:32:42,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:42,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053190216] [2024-10-15 14:32:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:42,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:42,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:42,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:42,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:42,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053190216] [2024-10-15 14:32:42,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053190216] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:42,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400791793] [2024-10-15 14:32:42,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:32:42,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:42,683 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:42,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-10-15 14:32:42,791 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:32:42,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:42,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 14:32:42,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:43,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:32:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400791793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:43,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 46 [2024-10-15 14:32:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826498583] [2024-10-15 14:32:43,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:43,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:43,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:43,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:43,290 INFO L87 Difference]: Start difference. First operand 1101 states and 1238 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:44,460 INFO L93 Difference]: Finished difference Result 1107 states and 1243 transitions. [2024-10-15 14:32:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 14:32:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:44,466 INFO L225 Difference]: With dead ends: 1107 [2024-10-15 14:32:44,467 INFO L226 Difference]: Without dead ends: 1083 [2024-10-15 14:32:44,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:44,476 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:44,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2265 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:32:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-10-15 14:32:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2024-10-15 14:32:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 969 states have (on average 1.1382868937048503) internal successors, (1103), 1039 states have internal predecessors, (1103), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2024-10-15 14:32:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1218 transitions. [2024-10-15 14:32:44,986 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1218 transitions. Word has length 56 [2024-10-15 14:32:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:44,986 INFO L471 AbstractCegarLoop]: Abstraction has 1083 states and 1218 transitions. [2024-10-15 14:32:44,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:44,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1218 transitions. [2024-10-15 14:32:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:44,993 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:44,994 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:45,006 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-10-15 14:32:45,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-10-15 14:32:45,194 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:45,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 47219324, now seen corresponding path program 95 times [2024-10-15 14:32:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:45,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446368087] [2024-10-15 14:32:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:45,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:45,321 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:45,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:45,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:45,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446368087] [2024-10-15 14:32:45,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446368087] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614136702] [2024-10-15 14:32:45,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:32:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:45,719 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:45,720 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-10-15 14:32:45,830 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-15 14:32:45,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:45,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-15 14:32:45,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:46,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:32:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614136702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:46,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:46,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 46 [2024-10-15 14:32:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900573471] [2024-10-15 14:32:46,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:46,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:46,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:46,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:46,431 INFO L87 Difference]: Start difference. First operand 1083 states and 1218 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:47,439 INFO L93 Difference]: Finished difference Result 1089 states and 1223 transitions. [2024-10-15 14:32:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:32:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:47,444 INFO L225 Difference]: With dead ends: 1089 [2024-10-15 14:32:47,444 INFO L226 Difference]: Without dead ends: 1063 [2024-10-15 14:32:47,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:47,454 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:47,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1613 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:32:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2024-10-15 14:32:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2024-10-15 14:32:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 952 states have (on average 1.138655462184874) internal successors, (1084), 1020 states have internal predecessors, (1084), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2024-10-15 14:32:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1196 transitions. [2024-10-15 14:32:48,014 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1196 transitions. Word has length 56 [2024-10-15 14:32:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:48,014 INFO L471 AbstractCegarLoop]: Abstraction has 1063 states and 1196 transitions. [2024-10-15 14:32:48,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:48,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1196 transitions. [2024-10-15 14:32:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:48,021 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:48,021 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:48,033 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-10-15 14:32:48,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:48,222 INFO L396 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:48,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2023403059, now seen corresponding path program 96 times [2024-10-15 14:32:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609304999] [2024-10-15 14:32:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:48,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:48,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:48,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:32:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-15 14:32:48,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:48,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609304999] [2024-10-15 14:32:48,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609304999] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:48,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079341837] [2024-10-15 14:32:48,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:32:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:48,601 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:48,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-10-15 14:32:48,709 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:32:48,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:48,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 14:32:48,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-15 14:32:49,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-15 14:32:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079341837] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:49,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:49,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-10-15 14:32:49,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142059466] [2024-10-15 14:32:49,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:49,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-15 14:32:49,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-15 14:32:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:49,727 INFO L87 Difference]: Start difference. First operand 1063 states and 1196 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:51,070 INFO L93 Difference]: Finished difference Result 1143 states and 1298 transitions. [2024-10-15 14:32:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:32:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-10-15 14:32:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:51,101 INFO L225 Difference]: With dead ends: 1143 [2024-10-15 14:32:51,101 INFO L226 Difference]: Without dead ends: 1125 [2024-10-15 14:32:51,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-10-15 14:32:51,119 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:51,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 879 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:32:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-10-15 14:32:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1121. [2024-10-15 14:32:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 977 states have (on average 1.1340839303991812) internal successors, (1108), 1067 states have internal predecessors, (1108), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-10-15 14:32:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1264 transitions. [2024-10-15 14:32:52,086 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1264 transitions. Word has length 56 [2024-10-15 14:32:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:52,086 INFO L471 AbstractCegarLoop]: Abstraction has 1121 states and 1264 transitions. [2024-10-15 14:32:52,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:52,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1264 transitions. [2024-10-15 14:32:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:52,094 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:52,094 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:52,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-10-15 14:32:52,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-10-15 14:32:52,295 INFO L396 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:52,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2053990524, now seen corresponding path program 97 times [2024-10-15 14:32:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62693639] [2024-10-15 14:32:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:52,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:52,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:52,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:52,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62693639] [2024-10-15 14:32:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62693639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447015413] [2024-10-15 14:32:52,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:32:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:52,731 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:52,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-10-15 14:32:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:52,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:32:52,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:53,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:32:53,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447015413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:53,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:53,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-10-15 14:32:53,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621787034] [2024-10-15 14:32:53,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:53,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-15 14:32:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-15 14:32:53,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:32:53,407 INFO L87 Difference]: Start difference. First operand 1121 states and 1264 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:54,354 INFO L93 Difference]: Finished difference Result 1137 states and 1284 transitions. [2024-10-15 14:32:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-15 14:32:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-10-15 14:32:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:54,366 INFO L225 Difference]: With dead ends: 1137 [2024-10-15 14:32:54,366 INFO L226 Difference]: Without dead ends: 1119 [2024-10-15 14:32:54,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2024-10-15 14:32:54,378 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:54,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1130 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:32:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-10-15 14:32:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1115. [2024-10-15 14:32:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 971 states have (on average 1.1359423274974254) internal successors, (1103), 1061 states have internal predecessors, (1103), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-10-15 14:32:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1259 transitions. [2024-10-15 14:32:54,979 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1259 transitions. Word has length 56 [2024-10-15 14:32:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:54,979 INFO L471 AbstractCegarLoop]: Abstraction has 1115 states and 1259 transitions. [2024-10-15 14:32:54,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:32:54,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1259 transitions. [2024-10-15 14:32:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 14:32:54,988 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:54,988 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:55,000 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-10-15 14:32:55,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-10-15 14:32:55,188 INFO L396 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:55,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1507543379, now seen corresponding path program 98 times [2024-10-15 14:32:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:55,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134434554] [2024-10-15 14:32:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:55,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:55,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:55,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:32:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-15 14:32:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:55,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134434554] [2024-10-15 14:32:55,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134434554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:55,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976947920] [2024-10-15 14:32:55,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:32:55,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:55,612 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:55,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-10-15 14:32:55,735 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:32:55,735 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:55,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-15 14:32:55,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:32:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-15 14:32:56,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:32:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-15 14:32:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976947920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:32:56,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:32:56,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-10-15 14:32:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976284829] [2024-10-15 14:32:56,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:32:56,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-15 14:32:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:32:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-15 14:32:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-10-15 14:32:56,743 INFO L87 Difference]: Start difference. First operand 1115 states and 1259 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:32:58,107 INFO L93 Difference]: Finished difference Result 1127 states and 1270 transitions. [2024-10-15 14:32:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:32:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-10-15 14:32:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:32:58,113 INFO L225 Difference]: With dead ends: 1127 [2024-10-15 14:32:58,113 INFO L226 Difference]: Without dead ends: 1101 [2024-10-15 14:32:58,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-10-15 14:32:58,124 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:32:58,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 787 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:32:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-10-15 14:32:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2024-10-15 14:32:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 955 states have (on average 1.1361256544502618) internal successors, (1085), 1045 states have internal predecessors, (1085), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2024-10-15 14:32:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1231 transitions. [2024-10-15 14:32:58,657 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1231 transitions. Word has length 56 [2024-10-15 14:32:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:32:58,657 INFO L471 AbstractCegarLoop]: Abstraction has 1099 states and 1231 transitions. [2024-10-15 14:32:58,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:32:58,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1231 transitions. [2024-10-15 14:32:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-15 14:32:58,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:32:58,665 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:32:58,677 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-10-15 14:32:58,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-10-15 14:32:58,866 INFO L396 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:32:58,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:32:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 697142747, now seen corresponding path program 99 times [2024-10-15 14:32:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:32:58,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063283061] [2024-10-15 14:32:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:32:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:32:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:58,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:32:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:58,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:32:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:59,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:32:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:32:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:32:59,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:32:59,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063283061] [2024-10-15 14:32:59,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063283061] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:32:59,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397590709] [2024-10-15 14:32:59,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:32:59,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:32:59,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:32:59,543 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:32:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-10-15 14:32:59,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-15 14:32:59,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:32:59,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:32:59,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:33:00,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:33:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397590709] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:02,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:02,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-10-15 14:33:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093981936] [2024-10-15 14:33:02,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:02,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-15 14:33:02,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-15 14:33:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-10-15 14:33:02,222 INFO L87 Difference]: Start difference. First operand 1099 states and 1231 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:33:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:05,569 INFO L93 Difference]: Finished difference Result 1231 states and 1388 transitions. [2024-10-15 14:33:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-15 14:33:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-10-15 14:33:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:05,591 INFO L225 Difference]: With dead ends: 1231 [2024-10-15 14:33:05,591 INFO L226 Difference]: Without dead ends: 1218 [2024-10-15 14:33:05,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-10-15 14:33:05,604 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:05,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1268 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:33:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-10-15 14:33:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1210. [2024-10-15 14:33:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1051 states have (on average 1.1351094196003806) internal successors, (1193), 1151 states have internal predecessors, (1193), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2024-10-15 14:33:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1359 transitions. [2024-10-15 14:33:06,298 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1359 transitions. Word has length 57 [2024-10-15 14:33:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:06,298 INFO L471 AbstractCegarLoop]: Abstraction has 1210 states and 1359 transitions. [2024-10-15 14:33:06,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:33:06,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1359 transitions. [2024-10-15 14:33:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-15 14:33:06,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:06,311 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:06,326 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:06,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-10-15 14:33:06,512 INFO L396 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:06,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1635153294, now seen corresponding path program 100 times [2024-10-15 14:33:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:06,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521788743] [2024-10-15 14:33:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:06,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:06,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:06,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:33:07,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:07,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521788743] [2024-10-15 14:33:07,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521788743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846745288] [2024-10-15 14:33:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:33:07,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:07,218 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:07,218 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-10-15 14:33:07,329 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:33:07,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:07,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:33:07,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:33:08,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 14:33:09,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846745288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:09,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:09,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-10-15 14:33:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034741868] [2024-10-15 14:33:09,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:09,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-15 14:33:09,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:09,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-15 14:33:09,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-10-15 14:33:09,896 INFO L87 Difference]: Start difference. First operand 1210 states and 1359 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:33:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:13,136 INFO L93 Difference]: Finished difference Result 1224 states and 1373 transitions. [2024-10-15 14:33:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-15 14:33:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-10-15 14:33:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:13,146 INFO L225 Difference]: With dead ends: 1224 [2024-10-15 14:33:13,147 INFO L226 Difference]: Without dead ends: 1213 [2024-10-15 14:33:13,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-10-15 14:33:13,165 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:13,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1505 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:33:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2024-10-15 14:33:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1211. [2024-10-15 14:33:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1052 states have (on average 1.1349809885931559) internal successors, (1194), 1152 states have internal predecessors, (1194), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-10-15 14:33:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1354 transitions. [2024-10-15 14:33:13,849 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1354 transitions. Word has length 57 [2024-10-15 14:33:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:13,849 INFO L471 AbstractCegarLoop]: Abstraction has 1211 states and 1354 transitions. [2024-10-15 14:33:13,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 14:33:13,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1354 transitions. [2024-10-15 14:33:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-15 14:33:13,863 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:13,864 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:13,876 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-10-15 14:33:14,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:14,064 INFO L396 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:14,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash -201882063, now seen corresponding path program 101 times [2024-10-15 14:33:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970073738] [2024-10-15 14:33:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:14,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:14,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:14,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970073738] [2024-10-15 14:33:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970073738] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206777887] [2024-10-15 14:33:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:33:14,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:14,215 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:14,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-10-15 14:33:14,336 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-15 14:33:14,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:14,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:33:14,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:14,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206777887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:14,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-10-15 14:33:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222332930] [2024-10-15 14:33:14,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:14,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:33:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:33:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:33:14,535 INFO L87 Difference]: Start difference. First operand 1211 states and 1354 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:33:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:15,456 INFO L93 Difference]: Finished difference Result 1250 states and 1403 transitions. [2024-10-15 14:33:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-15 14:33:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-10-15 14:33:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:15,463 INFO L225 Difference]: With dead ends: 1250 [2024-10-15 14:33:15,463 INFO L226 Difference]: Without dead ends: 1218 [2024-10-15 14:33:15,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-10-15 14:33:15,477 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:15,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:33:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-10-15 14:33:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1208. [2024-10-15 14:33:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1055 states have (on average 1.1308056872037915) internal successors, (1193), 1151 states have internal predecessors, (1193), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-10-15 14:33:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1345 transitions. [2024-10-15 14:33:16,114 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1345 transitions. Word has length 57 [2024-10-15 14:33:16,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:16,114 INFO L471 AbstractCegarLoop]: Abstraction has 1208 states and 1345 transitions. [2024-10-15 14:33:16,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-15 14:33:16,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1345 transitions. [2024-10-15 14:33:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-15 14:33:16,124 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:16,124 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:16,136 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:16,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:16,324 INFO L396 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:16,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash -561571686, now seen corresponding path program 102 times [2024-10-15 14:33:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468434912] [2024-10-15 14:33:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:16,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:16,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:16,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:33:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468434912] [2024-10-15 14:33:16,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468434912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266772510] [2024-10-15 14:33:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:33:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:16,471 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:16,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-10-15 14:33:16,590 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:33:16,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:16,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-15 14:33:16,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:16,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-15 14:33:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266772510] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:16,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-10-15 14:33:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246887931] [2024-10-15 14:33:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:16,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:33:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:33:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:33:16,782 INFO L87 Difference]: Start difference. First operand 1208 states and 1345 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:17,699 INFO L93 Difference]: Finished difference Result 1834 states and 2016 transitions. [2024-10-15 14:33:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-15 14:33:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-10-15 14:33:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:17,735 INFO L225 Difference]: With dead ends: 1834 [2024-10-15 14:33:17,735 INFO L226 Difference]: Without dead ends: 1221 [2024-10-15 14:33:17,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-10-15 14:33:17,752 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:17,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-10-15 14:33:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-10-15 14:33:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-10-15 14:33:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1358 transitions. [2024-10-15 14:33:18,469 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1358 transitions. Word has length 57 [2024-10-15 14:33:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:18,469 INFO L471 AbstractCegarLoop]: Abstraction has 1221 states and 1358 transitions. [2024-10-15 14:33:18,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:18,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1358 transitions. [2024-10-15 14:33:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:18,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:18,479 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:18,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-10-15 14:33:18,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-10-15 14:33:18,679 INFO L396 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:18,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1902474405, now seen corresponding path program 103 times [2024-10-15 14:33:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382526886] [2024-10-15 14:33:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:18,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:18,805 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:19,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:33:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382526886] [2024-10-15 14:33:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382526886] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814099253] [2024-10-15 14:33:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:33:19,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:19,402 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:19,403 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-10-15 14:33:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:19,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-15 14:33:19,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:33:19,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:33:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814099253] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:19,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:19,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 48 [2024-10-15 14:33:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314843013] [2024-10-15 14:33:19,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:19,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2153, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:19,915 INFO L87 Difference]: Start difference. First operand 1221 states and 1358 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:21,786 INFO L93 Difference]: Finished difference Result 1357 states and 1511 transitions. [2024-10-15 14:33:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-15 14:33:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:21,799 INFO L225 Difference]: With dead ends: 1357 [2024-10-15 14:33:21,799 INFO L226 Difference]: Without dead ends: 1351 [2024-10-15 14:33:21,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:21,814 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 137 mSDsluCounter, 5054 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:21,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 5177 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:33:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2024-10-15 14:33:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1235. [2024-10-15 14:33:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1079 states have (on average 1.1297497683039852) internal successors, (1219), 1177 states have internal predecessors, (1219), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2024-10-15 14:33:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1375 transitions. [2024-10-15 14:33:22,529 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1375 transitions. Word has length 58 [2024-10-15 14:33:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:22,529 INFO L471 AbstractCegarLoop]: Abstraction has 1235 states and 1375 transitions. [2024-10-15 14:33:22,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:22,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1375 transitions. [2024-10-15 14:33:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:22,539 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:22,539 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:22,551 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:22,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:22,739 INFO L396 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:22,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1757191105, now seen corresponding path program 104 times [2024-10-15 14:33:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796676834] [2024-10-15 14:33:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:22,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:22,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:23,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:33:23,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796676834] [2024-10-15 14:33:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796676834] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73062458] [2024-10-15 14:33:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:33:23,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:23,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:23,404 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:23,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-10-15 14:33:23,522 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:33:23,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:23,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-15 14:33:23,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:33:23,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-15 14:33:23,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73062458] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:23,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:23,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 48 [2024-10-15 14:33:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939261073] [2024-10-15 14:33:23,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:23,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:23,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:23,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:23,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2149, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:23,965 INFO L87 Difference]: Start difference. First operand 1235 states and 1375 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:25,801 INFO L93 Difference]: Finished difference Result 1241 states and 1380 transitions. [2024-10-15 14:33:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:33:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:25,807 INFO L225 Difference]: With dead ends: 1241 [2024-10-15 14:33:25,808 INFO L226 Difference]: Without dead ends: 1221 [2024-10-15 14:33:25,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:25,821 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 116 mSDsluCounter, 4707 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:25,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4818 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:33:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-10-15 14:33:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-10-15 14:33:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2024-10-15 14:33:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1359 transitions. [2024-10-15 14:33:26,456 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1359 transitions. Word has length 58 [2024-10-15 14:33:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:26,456 INFO L471 AbstractCegarLoop]: Abstraction has 1221 states and 1359 transitions. [2024-10-15 14:33:26,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:26,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1359 transitions. [2024-10-15 14:33:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:26,465 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:26,466 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:26,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:26,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-10-15 14:33:26,666 INFO L396 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:26,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash -711669595, now seen corresponding path program 105 times [2024-10-15 14:33:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084411687] [2024-10-15 14:33:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:26,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:26,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:26,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:33:27,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:27,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084411687] [2024-10-15 14:33:27,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084411687] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:27,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667903924] [2024-10-15 14:33:27,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:33:27,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:27,287 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:27,288 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-10-15 14:33:27,411 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-15 14:33:27,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:27,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 14:33:27,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:33:27,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 14:33:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667903924] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:27,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:27,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 48 [2024-10-15 14:33:27,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730324346] [2024-10-15 14:33:27,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:27,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:27,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2145, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:27,894 INFO L87 Difference]: Start difference. First operand 1221 states and 1359 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:29,510 INFO L93 Difference]: Finished difference Result 1227 states and 1364 transitions. [2024-10-15 14:33:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-15 14:33:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:29,517 INFO L225 Difference]: With dead ends: 1227 [2024-10-15 14:33:29,517 INFO L226 Difference]: Without dead ends: 1205 [2024-10-15 14:33:29,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=2725, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:29,534 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 97 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:29,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3662 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:33:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2024-10-15 14:33:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2024-10-15 14:33:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1055 states have (on average 1.128909952606635) internal successors, (1191), 1149 states have internal predecessors, (1191), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2024-10-15 14:33:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1341 transitions. [2024-10-15 14:33:30,154 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1341 transitions. Word has length 58 [2024-10-15 14:33:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:30,154 INFO L471 AbstractCegarLoop]: Abstraction has 1205 states and 1341 transitions. [2024-10-15 14:33:30,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:30,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1341 transitions. [2024-10-15 14:33:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:30,163 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:30,163 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:30,175 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:30,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-10-15 14:33:30,363 INFO L396 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:30,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash -148391999, now seen corresponding path program 106 times [2024-10-15 14:33:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069574036] [2024-10-15 14:33:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:30,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:30,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:30,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:33:31,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:31,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069574036] [2024-10-15 14:33:31,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069574036] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:31,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063593442] [2024-10-15 14:33:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:33:31,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:31,015 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:31,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-10-15 14:33:31,134 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:33:31,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:31,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-15 14:33:31,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:33:31,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 14:33:31,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063593442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:31,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:31,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 48 [2024-10-15 14:33:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432943161] [2024-10-15 14:33:31,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:31,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:31,659 INFO L87 Difference]: Start difference. First operand 1205 states and 1341 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:32,972 INFO L93 Difference]: Finished difference Result 1211 states and 1346 transitions. [2024-10-15 14:33:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-15 14:33:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:32,979 INFO L225 Difference]: With dead ends: 1211 [2024-10-15 14:33:32,979 INFO L226 Difference]: Without dead ends: 1187 [2024-10-15 14:33:33,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:33,006 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:33,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2658 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:33:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2024-10-15 14:33:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2024-10-15 14:33:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1040 states have (on average 1.1288461538461538) internal successors, (1174), 1132 states have internal predecessors, (1174), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2024-10-15 14:33:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1321 transitions. [2024-10-15 14:33:33,709 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1321 transitions. Word has length 58 [2024-10-15 14:33:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:33,709 INFO L471 AbstractCegarLoop]: Abstraction has 1187 states and 1321 transitions. [2024-10-15 14:33:33,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:33,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1321 transitions. [2024-10-15 14:33:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:33,717 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:33,717 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:33,729 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-10-15 14:33:33,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:33,918 INFO L396 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:33,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1511996581, now seen corresponding path program 107 times [2024-10-15 14:33:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:33,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472670464] [2024-10-15 14:33:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:33,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:33:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:34,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472670464] [2024-10-15 14:33:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472670464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:34,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409096189] [2024-10-15 14:33:34,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:33:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:34,460 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:34,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-10-15 14:33:34,580 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-15 14:33:34,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:34,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 14:33:34,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:33:35,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-15 14:33:35,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409096189] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:35,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:35,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 48 [2024-10-15 14:33:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715849100] [2024-10-15 14:33:35,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:35,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:35,170 INFO L87 Difference]: Start difference. First operand 1187 states and 1321 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:36,415 INFO L93 Difference]: Finished difference Result 1193 states and 1326 transitions. [2024-10-15 14:33:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 14:33:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:36,422 INFO L225 Difference]: With dead ends: 1193 [2024-10-15 14:33:36,422 INFO L226 Difference]: Without dead ends: 1167 [2024-10-15 14:33:36,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2717, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:36,434 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:36,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2279 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:33:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2024-10-15 14:33:37,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2024-10-15 14:33:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1113 states have internal predecessors, (1155), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2024-10-15 14:33:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1299 transitions. [2024-10-15 14:33:37,111 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1299 transitions. Word has length 58 [2024-10-15 14:33:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:37,112 INFO L471 AbstractCegarLoop]: Abstraction has 1167 states and 1299 transitions. [2024-10-15 14:33:37,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:37,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1299 transitions. [2024-10-15 14:33:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 14:33:37,120 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:37,120 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:37,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-10-15 14:33:37,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:37,320 INFO L396 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:37,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1143491647, now seen corresponding path program 108 times [2024-10-15 14:33:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020998467] [2024-10-15 14:33:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:37,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:37,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:37,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-15 14:33:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:37,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 14:33:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:33:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020998467] [2024-10-15 14:33:37,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020998467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462235364] [2024-10-15 14:33:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:33:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:37,804 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:37,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-10-15 14:33:37,924 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-15 14:33:37,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:37,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:33:37,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:33:38,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-15 14:33:38,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462235364] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:38,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:38,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 48 [2024-10-15 14:33:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116805049] [2024-10-15 14:33:38,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:38,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 14:33:38,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 14:33:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2133, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:33:38,525 INFO L87 Difference]: Start difference. First operand 1167 states and 1299 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 14:33:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:39,689 INFO L93 Difference]: Finished difference Result 1173 states and 1304 transitions. [2024-10-15 14:33:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-15 14:33:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-10-15 14:33:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:39,695 INFO L225 Difference]: With dead ends: 1173 [2024-10-15 14:33:39,695 INFO L226 Difference]: Without dead ends: 1145 [2024-10-15 14:33:39,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2024-10-15 14:33:39,707 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:39,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1491 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:33:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states.