./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:23:29,746 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:23:29,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:23:29,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:23:29,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:23:29,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:23:29,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:23:29,832 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:23:29,833 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:23:29,833 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:23:29,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:23:29,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:23:29,836 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:23:29,841 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:23:29,841 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:23:29,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:23:29,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:23:29,842 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:23:29,842 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:23:29,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:23:29,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:23:29,843 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:23:29,843 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:23:29,844 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:23:29,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:23:29,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:23:29,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:23:29,846 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:23:29,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:23:29,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:23:29,847 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:23:29,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:23:29,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:23:29,848 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:23:29,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:23:29,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:23:29,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:23:29,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:23:29,849 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:23:29,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:23:29,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:23:29,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:23:29,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:23:30,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:23:30,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:23:30,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:23:30,127 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:23:30,127 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:23:30,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-13 00:23:31,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:23:31,777 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:23:31,778 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-13 00:23:31,786 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4888899b5/c8c8ff4a14574357bba5a09494a9baa5/FLAG3a00f9b50 [2024-09-13 00:23:32,180 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4888899b5/c8c8ff4a14574357bba5a09494a9baa5 [2024-09-13 00:23:32,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:23:32,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:23:32,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:23:32,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:23:32,191 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:23:32,192 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34da9e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32, skipping insertion in model container [2024-09-13 00:23:32,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,213 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:23:32,353 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-13 00:23:32,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:23:32,399 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:23:32,412 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-13 00:23:32,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:23:32,443 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:23:32,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32 WrapperNode [2024-09-13 00:23:32,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:23:32,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:23:32,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:23:32,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:23:32,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,492 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:23:32,493 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:23:32,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:23:32,494 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:23:32,494 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:23:32,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,559 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 00:23:32,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:23:32,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:23:32,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:23:32,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:23:32,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (1/1) ... [2024-09-13 00:23:32,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:23:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:32,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 00:23:32,621 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 00:23:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:23:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:23:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:23:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:23:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:23:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:23:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:23:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:23:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:23:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:23:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:23:32,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:23:32,722 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:23:32,724 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:23:32,912 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 00:23:32,913 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:23:32,930 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:23:32,930 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 00:23:32,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:23:32 BoogieIcfgContainer [2024-09-13 00:23:32,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:23:32,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:23:32,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:23:32,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:23:32,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:23:32" (1/3) ... [2024-09-13 00:23:32,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543011d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:23:32, skipping insertion in model container [2024-09-13 00:23:32,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:23:32" (2/3) ... [2024-09-13 00:23:32,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543011d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:23:32, skipping insertion in model container [2024-09-13 00:23:32,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:23:32" (3/3) ... [2024-09-13 00:23:32,939 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2024-09-13 00:23:32,953 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:23:32,954 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:23:33,002 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:23:33,007 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58303f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:23:33,007 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:23:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 00:23:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 00:23:33,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:33,019 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-13 00:23:33,020 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:33,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-13 00:23:33,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:33,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235862557] [2024-09-13 00:23:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:23:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:23:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:23:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:23:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:23:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:23:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:23:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:23:33,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:33,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235862557] [2024-09-13 00:23:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235862557] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:23:33,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:23:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:23:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752394493] [2024-09-13 00:23:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:23:33,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:23:33,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:23:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:23:33,257 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:23:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:33,282 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-13 00:23:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:23:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-13 00:23:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:33,290 INFO L225 Difference]: With dead ends: 70 [2024-09-13 00:23:33,291 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 00:23:33,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:23:33,296 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:33,297 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:23:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 00:23:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 00:23:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 00:23:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-13 00:23:33,331 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-13 00:23:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:33,331 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-13 00:23:33,332 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:23:33,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-13 00:23:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 00:23:33,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:33,334 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-13 00:23:33,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:23:33,335 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:33,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-13 00:23:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:33,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308718901] [2024-09-13 00:23:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:23:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:23:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:23:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:23:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:23:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:23:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:23:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:23:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308718901] [2024-09-13 00:23:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308718901] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:33,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018115283] [2024-09-13 00:23:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:33,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:33,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:33,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:23:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:33,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 00:23:33,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:23:34,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018115283] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:34,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:23:34,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-13 00:23:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338929733] [2024-09-13 00:23:34,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:34,199 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:23:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:23:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:23:34,202 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:23:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:34,432 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-13 00:23:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:23:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-13 00:23:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:34,434 INFO L225 Difference]: With dead ends: 55 [2024-09-13 00:23:34,436 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 00:23:34,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:23:34,438 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:34,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:23:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 00:23:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 00:23:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:23:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-13 00:23:34,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-13 00:23:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:34,462 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-13 00:23:34,462 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:23:34,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-13 00:23:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 00:23:34,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:34,464 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-13 00:23:34,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:23:34,664 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:34,665 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:34,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-13 00:23:34,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:34,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503406532] [2024-09-13 00:23:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:34,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:34,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328509170] [2024-09-13 00:23:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:34,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:34,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:23:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:34,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:23:34,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:23:34,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:23:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503406532] [2024-09-13 00:23:34,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328509170] [2024-09-13 00:23:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328509170] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:23:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:23:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:23:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580048570] [2024-09-13 00:23:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:23:34,793 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:23:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:23:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:23:34,794 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:23:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:34,837 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-13 00:23:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:23:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-13 00:23:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:34,839 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:23:34,839 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:23:34,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:23:34,840 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:34,841 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:23:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:23:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-13 00:23:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:23:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-13 00:23:34,852 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-13 00:23:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:34,853 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-13 00:23:34,853 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:23:34,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-13 00:23:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 00:23:34,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:34,855 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-09-13 00:23:34,873 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 00:23:35,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:35,059 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-13 00:23:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897154881] [2024-09-13 00:23:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:35,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137082475] [2024-09-13 00:23:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:35,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:35,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:23:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:35,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:23:35,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:23:35,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:23:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897154881] [2024-09-13 00:23:35,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:35,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137082475] [2024-09-13 00:23:35,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137082475] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:23:35,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:23:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:23:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350115637] [2024-09-13 00:23:35,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:23:35,231 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:23:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:23:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:23:35,232 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:23:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:35,272 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-13 00:23:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:23:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 00:23:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:35,275 INFO L225 Difference]: With dead ends: 61 [2024-09-13 00:23:35,275 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 00:23:35,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:23:35,276 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:35,276 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:23:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 00:23:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-13 00:23:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:23:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-13 00:23:35,288 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-13 00:23:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:35,288 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-13 00:23:35,288 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:23:35,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-13 00:23:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 00:23:35,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:35,290 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2024-09-13 00:23:35,305 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:23:35,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:35,495 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:35,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:35,496 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-13 00:23:35,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:35,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609160021] [2024-09-13 00:23:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:35,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:35,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450453323] [2024-09-13 00:23:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:35,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:35,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:23:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:35,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:23:35,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 00:23:35,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:23:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609160021] [2024-09-13 00:23:35,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450453323] [2024-09-13 00:23:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450453323] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:23:35,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:23:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:23:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816447926] [2024-09-13 00:23:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:23:35,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:23:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:23:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:23:35,719 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:23:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:35,807 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-13 00:23:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:23:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-13 00:23:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:35,809 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:23:35,809 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:23:35,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:23:35,811 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 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 [2024-09-13 00:23:35,812 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:23:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:23:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-13 00:23:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:23:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 00:23:35,834 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-13 00:23:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:35,835 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 00:23:35,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:23:35,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 00:23:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 00:23:35,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:35,837 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:23:35,858 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 00:23:36,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:36,045 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:36,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-13 00:23:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599955157] [2024-09-13 00:23:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:36,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:36,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814675598] [2024-09-13 00:23:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:36,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:36,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:36,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:23:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:23:36,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:23:36,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:23:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599955157] [2024-09-13 00:23:36,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814675598] [2024-09-13 00:23:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814675598] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:23:36,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:23:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-13 00:23:36,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028655301] [2024-09-13 00:23:36,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:36,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:23:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:23:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:23:36,304 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:23:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:36,425 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-13 00:23:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 00:23:36,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-13 00:23:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:36,427 INFO L225 Difference]: With dead ends: 90 [2024-09-13 00:23:36,427 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 00:23:36,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:23:36,428 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:36,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:23:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 00:23:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-13 00:23:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:23:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-13 00:23:36,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-13 00:23:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:36,447 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-13 00:23:36,447 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:23:36,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-13 00:23:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 00:23:36,449 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:36,449 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:23:36,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 00:23:36,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 00:23:36,650 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:36,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-13 00:23:36,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:36,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212676313] [2024-09-13 00:23:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:36,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:23:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:23:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:23:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:23:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:23:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:23:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:23:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:23:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:23:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:23:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:23:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:23:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212676313] [2024-09-13 00:23:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212676313] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682511744] [2024-09-13 00:23:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:36,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:36,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:36,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:23:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:36,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:23:36,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:23:36,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:23:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682511744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:23:36,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:23:36,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 00:23:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388666749] [2024-09-13 00:23:36,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:36,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 00:23:36,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 00:23:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:23:36,988 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:23:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:37,174 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-13 00:23:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:23:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-13 00:23:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:37,176 INFO L225 Difference]: With dead ends: 105 [2024-09-13 00:23:37,176 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 00:23:37,176 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:23:37,177 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:37,177 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:23:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 00:23:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-13 00:23:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-13 00:23:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-13 00:23:37,214 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-13 00:23:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:37,215 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-13 00:23:37,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:23:37,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-13 00:23:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 00:23:37,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:37,216 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2024-09-13 00:23:37,233 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 00:23:37,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:37,418 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:37,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-13 00:23:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293588031] [2024-09-13 00:23:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:37,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:37,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263312159] [2024-09-13 00:23:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:37,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:37,441 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:23:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:37,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 00:23:37,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 00:23:37,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293588031] [2024-09-13 00:23:37,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263312159] [2024-09-13 00:23:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263312159] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:37,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:23:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-13 00:23:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771368030] [2024-09-13 00:23:37,663 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:37,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:23:37,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:23:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:23:37,664 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:23:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:37,776 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 00:23:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:23:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-13 00:23:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:37,779 INFO L225 Difference]: With dead ends: 123 [2024-09-13 00:23:37,779 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 00:23:37,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:23:37,780 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:37,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:23:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 00:23:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 00:23:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:23:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-13 00:23:37,825 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-13 00:23:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:37,827 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-13 00:23:37,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:23:37,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-13 00:23:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 00:23:37,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:37,829 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:23:37,847 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 00:23:38,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:38,030 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:38,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-13 00:23:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:38,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257911110] [2024-09-13 00:23:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616172500] [2024-09-13 00:23:38,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:23:38,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:38,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:38,058 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:38,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:23:38,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:23:38,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:23:38,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:23:38,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 00:23:38,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257911110] [2024-09-13 00:23:38,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616172500] [2024-09-13 00:23:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616172500] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:38,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:23:38,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:23:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272893744] [2024-09-13 00:23:38,411 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:38,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:23:38,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:23:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:23:38,413 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:23:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:38,562 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-13 00:23:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:23:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-13 00:23:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:38,564 INFO L225 Difference]: With dead ends: 129 [2024-09-13 00:23:38,564 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 00:23:38,565 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 00:23:38,565 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:38,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:23:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 00:23:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-13 00:23:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:23:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-13 00:23:38,592 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-13 00:23:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:38,592 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-13 00:23:38,593 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:23:38,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-13 00:23:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 00:23:38,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:38,594 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:23:38,611 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 00:23:38,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:38,799 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:38,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-13 00:23:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:38,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528007946] [2024-09-13 00:23:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:38,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528336166] [2024-09-13 00:23:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:23:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:38,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:38,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:38,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:23:38,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:23:38,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:23:38,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 00:23:38,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-13 00:23:40,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:54,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528007946] [2024-09-13 00:23:54,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:54,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528336166] [2024-09-13 00:23:54,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528336166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:23:54,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:23:54,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:23:54,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575673550] [2024-09-13 00:23:54,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:54,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:23:54,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:54,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:23:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-09-13 00:23:54,944 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:23:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:23:55,691 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-13 00:23:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:23:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-13 00:23:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:23:55,693 INFO L225 Difference]: With dead ends: 133 [2024-09-13 00:23:55,693 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 00:23:55,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:23:55,694 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:23:55,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:23:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 00:23:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-13 00:23:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:23:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-13 00:23:55,742 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-13 00:23:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:23:55,743 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-13 00:23:55,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:23:55,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-13 00:23:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 00:23:55,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:23:55,744 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:23:55,762 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 00:23:55,945 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 00:23:55,945 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:23:55,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:23:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-13 00:23:55,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:23:55,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951689098] [2024-09-13 00:23:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:23:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:23:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024778628] [2024-09-13 00:23:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:23:55,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:23:55,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:23:55,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:23:55,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 00:23:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:23:56,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:23:56,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:23:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-13 00:23:56,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:23:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 00:23:57,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:23:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951689098] [2024-09-13 00:23:57,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:23:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024778628] [2024-09-13 00:23:57,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024778628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:23:57,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:23:57,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 00:23:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426837837] [2024-09-13 00:23:57,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:23:57,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:23:57,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:23:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:23:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:23:57,378 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:23:59,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:24:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:01,586 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-13 00:24:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:24:01,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-13 00:24:01,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:01,589 INFO L225 Difference]: With dead ends: 229 [2024-09-13 00:24:01,589 INFO L226 Difference]: Without dead ends: 225 [2024-09-13 00:24:01,590 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:24:01,591 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:01,591 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-13 00:24:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-13 00:24:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-13 00:24:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-13 00:24:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-13 00:24:01,686 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-13 00:24:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:01,686 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-13 00:24:01,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:24:01,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-13 00:24:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 00:24:01,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:01,688 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:01,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:01,888 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 00:24:01,888 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:01,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-13 00:24:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:01,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614560997] [2024-09-13 00:24:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:24:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:24:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:24:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:24:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:24:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:24:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:01,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:24:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:02,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:24:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:02,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-13 00:24:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-13 00:24:02,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:02,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614560997] [2024-09-13 00:24:02,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614560997] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:02,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:02,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:24:02,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049443286] [2024-09-13 00:24:02,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:02,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:24:02,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:24:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:24:02,011 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:24:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:02,162 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-13 00:24:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:24:02,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-13 00:24:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:02,164 INFO L225 Difference]: With dead ends: 275 [2024-09-13 00:24:02,165 INFO L226 Difference]: Without dead ends: 201 [2024-09-13 00:24:02,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:02,166 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:02,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-13 00:24:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-13 00:24:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:24:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-13 00:24:02,233 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-13 00:24:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:02,233 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-13 00:24:02,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:24:02,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-13 00:24:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-13 00:24:02,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:02,236 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:02,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 00:24:02,236 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:02,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-13 00:24:02,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:02,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857983254] [2024-09-13 00:24:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:02,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:02,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132492116] [2024-09-13 00:24:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:02,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:02,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 00:24:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:02,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 00:24:02,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 00:24:04,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:04,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:04,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857983254] [2024-09-13 00:24:04,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:04,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132492116] [2024-09-13 00:24:04,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132492116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:04,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:04,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:24:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003378239] [2024-09-13 00:24:04,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:04,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:24:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:24:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:24:04,288 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:24:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:05,112 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-13 00:24:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:24:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-13 00:24:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:05,117 INFO L225 Difference]: With dead ends: 201 [2024-09-13 00:24:05,118 INFO L226 Difference]: Without dead ends: 199 [2024-09-13 00:24:05,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:24:05,119 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:05,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:24:05,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-13 00:24:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-13 00:24:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:24:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-13 00:24:05,192 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-13 00:24:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:05,193 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-13 00:24:05,193 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:24:05,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-13 00:24:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 00:24:05,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:05,195 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:05,219 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 00:24:05,395 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:05,395 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:05,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-13 00:24:05,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:05,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418700817] [2024-09-13 00:24:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:05,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:24:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:24:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:24:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:24:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:24:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:24:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:24:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:24:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:24:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:24:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:24:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:24:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:24:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:05,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418700817] [2024-09-13 00:24:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418700817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051270996] [2024-09-13 00:24:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:05,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:05,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:05,625 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 00:24:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:05,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:24:05,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-13 00:24:05,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051270996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:05,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:24:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-13 00:24:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528083691] [2024-09-13 00:24:05,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:05,852 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:24:05,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:24:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:05,853 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:24:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:06,092 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-13 00:24:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 00:24:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-13 00:24:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:06,094 INFO L225 Difference]: With dead ends: 227 [2024-09-13 00:24:06,094 INFO L226 Difference]: Without dead ends: 215 [2024-09-13 00:24:06,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:24:06,095 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:06,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-13 00:24:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-13 00:24:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-13 00:24:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-13 00:24:06,182 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-13 00:24:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:06,185 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-13 00:24:06,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:24:06,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-13 00:24:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 00:24:06,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:06,187 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 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] [2024-09-13 00:24:06,205 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 00:24:06,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 00:24:06,387 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:06,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-13 00:24:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116898049] [2024-09-13 00:24:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186735556] [2024-09-13 00:24:06,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:24:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:06,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:06,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 00:24:06,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:24:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:06,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 00:24:06,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:06,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:06,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116898049] [2024-09-13 00:24:06,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:06,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186735556] [2024-09-13 00:24:06,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186735556] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:06,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:06,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:24:06,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286329715] [2024-09-13 00:24:06,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:06,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:24:06,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:24:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:24:06,902 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:24:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:07,145 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-13 00:24:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:24:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-13 00:24:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:07,147 INFO L225 Difference]: With dead ends: 230 [2024-09-13 00:24:07,147 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 00:24:07,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 00:24:07,148 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:07,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 00:24:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-13 00:24:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:24:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-13 00:24:07,233 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-13 00:24:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:07,233 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-13 00:24:07,233 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:24:07,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-13 00:24:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-13 00:24:07,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:07,235 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:07,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 00:24:07,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 00:24:07,436 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:07,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-13 00:24:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230751464] [2024-09-13 00:24:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874619594] [2024-09-13 00:24:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:24:07,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:07,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:07,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 00:24:07,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:24:07,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:07,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 00:24:07,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:24:07,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:24:08,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230751464] [2024-09-13 00:24:08,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874619594] [2024-09-13 00:24:08,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874619594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:08,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:08,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 00:24:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865272148] [2024-09-13 00:24:08,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:08,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:24:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:24:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:24:08,407 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:24:12,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:24:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:13,654 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-13 00:24:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:24:13,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-13 00:24:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:13,660 INFO L225 Difference]: With dead ends: 253 [2024-09-13 00:24:13,661 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 00:24:13,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:24:13,662 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:13,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 360 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-13 00:24:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 00:24:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-13 00:24:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:24:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-13 00:24:13,781 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-13 00:24:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:13,782 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-13 00:24:13,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:24:13,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-13 00:24:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 00:24:13,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:13,787 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-13 00:24:13,804 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 00:24:13,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 00:24:13,988 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:13,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-13 00:24:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:13,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902942452] [2024-09-13 00:24:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:13,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124740301] [2024-09-13 00:24:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:24:14,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:14,016 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:14,028 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 00:24:14,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:24:14,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:14,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 00:24:14,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:24:14,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:36,578 WARN L293 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:24:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:24:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902942452] [2024-09-13 00:24:57,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124740301] [2024-09-13 00:24:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124740301] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:57,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-13 00:24:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762012313] [2024-09-13 00:24:57,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:57,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:24:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:24:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=390, Unknown=1, NotChecked=0, Total=506 [2024-09-13 00:24:57,114 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:25:02,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:25:33,312 WARN L293 SmtUtils]: Spent 24.85s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:25:37,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:25:43,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:25:48,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:25:53,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:25:59,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:12,617 WARN L293 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:26:16,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:23,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:24,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:33,435 WARN L293 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:26:36,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:40,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:44,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:48,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:52,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:56,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:12,296 WARN L293 SmtUtils]: Spent 13.50s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:27:18,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:27:20,014 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-13 00:27:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 00:27:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-13 00:27:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:27:20,017 INFO L225 Difference]: With dead ends: 318 [2024-09-13 00:27:20,017 INFO L226 Difference]: Without dead ends: 316 [2024-09-13 00:27:20,018 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 98.3s TimeCoverageRelationStatistics Valid=399, Invalid=1081, Unknown=2, NotChecked=0, Total=1482 [2024-09-13 00:27:20,019 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 112 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:27:20,019 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 512 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 569 Invalid, 11 Unknown, 0 Unchecked, 63.3s Time] [2024-09-13 00:27:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-13 00:27:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-13 00:27:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-13 00:27:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-13 00:27:20,361 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-13 00:27:20,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:27:20,361 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-13 00:27:20,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:27:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:27:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-13 00:27:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-13 00:27:20,362 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:27:20,362 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-13 00:27:20,379 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 00:27:20,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 00:27:20,563 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:27:20,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:27:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-13 00:27:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:27:20,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453084216] [2024-09-13 00:27:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:27:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:27:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:27:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578161000] [2024-09-13 00:27:20,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:27:20,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:27:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:27:20,584 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:27:20,589 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 00:27:20,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 00:27:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:27:20,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-13 00:27:20,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:27:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-13 00:27:21,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:28:52,069 WARN L293 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:29:04,126 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:29:38,910 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:29:39,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453084216] [2024-09-13 00:29:39,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578161000] [2024-09-13 00:29:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578161000] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:39,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:29:39,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:29:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881719343] [2024-09-13 00:29:39,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:39,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:29:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:29:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=695, Unknown=7, NotChecked=0, Total=870 [2024-09-13 00:29:39,107 INFO L87 Difference]: Start difference. First operand 310 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:29:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:52,298 INFO L93 Difference]: Finished difference Result 369 states and 516 transitions. [2024-09-13 00:29:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:29:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 131 [2024-09-13 00:29:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:52,300 INFO L225 Difference]: With dead ends: 369 [2024-09-13 00:29:52,300 INFO L226 Difference]: Without dead ends: 367 [2024-09-13 00:29:52,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 79.9s TimeCoverageRelationStatistics Valid=275, Invalid=1121, Unknown=10, NotChecked=0, Total=1406 [2024-09-13 00:29:52,301 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:52,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 461 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:29:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-09-13 00:29:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2024-09-13 00:29:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 191 states have internal predecessors, (218), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:29:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 509 transitions. [2024-09-13 00:29:52,640 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 509 transitions. Word has length 131 [2024-09-13 00:29:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:52,640 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 509 transitions. [2024-09-13 00:29:52,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:29:52,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 509 transitions. [2024-09-13 00:29:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-13 00:29:52,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:52,642 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-13 00:29:52,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:52,842 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:52,843 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:52,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-13 00:29:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:52,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028579885] [2024-09-13 00:29:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:52,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:52,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961501950] [2024-09-13 00:29:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:29:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:52,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:29:52,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 00:29:52,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:29:52,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:52,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:29:52,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 00:29:53,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:55,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:55,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028579885] [2024-09-13 00:29:55,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:55,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961501950] [2024-09-13 00:29:55,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961501950] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:55,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:29:55,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:29:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888904751] [2024-09-13 00:29:55,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:55,872 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:29:55,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:29:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:29:55,872 INFO L87 Difference]: Start difference. First operand 362 states and 509 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:29:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:56,948 INFO L93 Difference]: Finished difference Result 391 states and 552 transitions. [2024-09-13 00:29:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:29:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-13 00:29:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:56,950 INFO L225 Difference]: With dead ends: 391 [2024-09-13 00:29:56,950 INFO L226 Difference]: Without dead ends: 384 [2024-09-13 00:29:56,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:29:56,951 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:56,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 742 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:29:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-09-13 00:29:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 362. [2024-09-13 00:29:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.160427807486631) internal successors, (217), 191 states have internal predecessors, (217), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:29:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 508 transitions. [2024-09-13 00:29:57,298 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 508 transitions. Word has length 137 [2024-09-13 00:29:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:57,298 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 508 transitions. [2024-09-13 00:29:57,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:29:57,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 508 transitions. [2024-09-13 00:29:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-13 00:29:57,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:57,300 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:57,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 00:29:57,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:57,500 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:57,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 6 times [2024-09-13 00:29:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:57,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52297074] [2024-09-13 00:29:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:57,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843335024] [2024-09-13 00:29:57,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:29:57,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:57,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:57,518 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:29:57,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 00:29:58,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:29:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:58,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-13 00:29:58,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:30:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 102 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2024-09-13 00:30:02,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:30:09,224 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:31:18,587 WARN L293 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:31:54,626 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:32:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52297074] [2024-09-13 00:32:05,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843335024] [2024-09-13 00:32:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843335024] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:05,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:32:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710469227] [2024-09-13 00:32:05,466 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:05,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:32:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:32:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=737, Unknown=14, NotChecked=0, Total=930 [2024-09-13 00:32:05,467 INFO L87 Difference]: Start difference. First operand 362 states and 508 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:32:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:10,297 INFO L93 Difference]: Finished difference Result 425 states and 588 transitions. [2024-09-13 00:32:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:32:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 153 [2024-09-13 00:32:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:10,300 INFO L225 Difference]: With dead ends: 425 [2024-09-13 00:32:10,301 INFO L226 Difference]: Without dead ends: 423 [2024-09-13 00:32:10,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 93.5s TimeCoverageRelationStatistics Valid=237, Invalid=939, Unknown=14, NotChecked=0, Total=1190 [2024-09-13 00:32:10,301 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:10,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 311 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-13 00:32:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-13 00:32:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 418. [2024-09-13 00:32:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 217 states have (on average 1.152073732718894) internal successors, (250), 222 states have internal predecessors, (250), 167 states have call successors, (167), 34 states have call predecessors, (167), 33 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:32:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 581 transitions. [2024-09-13 00:32:10,851 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 581 transitions. Word has length 153 [2024-09-13 00:32:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:10,851 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 581 transitions. [2024-09-13 00:32:10,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:32:10,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 581 transitions. [2024-09-13 00:32:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-13 00:32:10,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:10,854 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:10,866 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 00:32:11,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:11,055 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:11,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-13 00:32:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311722824] [2024-09-13 00:32:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414286286] [2024-09-13 00:32:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:32:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:11,084 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:11,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 00:32:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:32:11,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:11,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:32:11,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-13 00:32:11,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:16,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311722824] [2024-09-13 00:32:16,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414286286] [2024-09-13 00:32:16,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414286286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:16,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:16,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 00:32:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846508160] [2024-09-13 00:32:16,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:16,525 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 00:32:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 00:32:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-13 00:32:16,527 INFO L87 Difference]: Start difference. First operand 418 states and 581 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:17,401 INFO L93 Difference]: Finished difference Result 435 states and 595 transitions. [2024-09-13 00:32:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 00:32:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-13 00:32:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:17,405 INFO L225 Difference]: With dead ends: 435 [2024-09-13 00:32:17,405 INFO L226 Difference]: Without dead ends: 428 [2024-09-13 00:32:17,405 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:32:17,406 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:17,406 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 241 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:32:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-09-13 00:32:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 417. [2024-09-13 00:32:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 218 states have (on average 1.1422018348623852) internal successors, (249), 223 states have internal predecessors, (249), 163 states have call successors, (163), 36 states have call predecessors, (163), 35 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2024-09-13 00:32:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2024-09-13 00:32:17,944 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 156 [2024-09-13 00:32:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:17,944 INFO L474 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2024-09-13 00:32:17,944 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:17,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2024-09-13 00:32:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:17,946 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:17,946 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:17,964 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-13 00:32:18,147 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-13 00:32:18,147 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-13 00:32:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418934951] [2024-09-13 00:32:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887088215] [2024-09-13 00:32:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:32:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:18,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:18,182 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:18,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 00:32:18,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:32:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:18,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-13 00:32:18,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-13 00:32:19,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418934951] [2024-09-13 00:32:22,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887088215] [2024-09-13 00:32:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887088215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:22,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:22,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:32:22,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745304564] [2024-09-13 00:32:22,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:22,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:32:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:32:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:32:22,108 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:24,037 INFO L93 Difference]: Finished difference Result 468 states and 645 transitions. [2024-09-13 00:32:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:32:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-13 00:32:24,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:24,041 INFO L225 Difference]: With dead ends: 468 [2024-09-13 00:32:24,041 INFO L226 Difference]: Without dead ends: 461 [2024-09-13 00:32:24,042 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:24,043 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:24,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 557 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:32:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-09-13 00:32:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 434. [2024-09-13 00:32:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 234 states have internal predecessors, (261), 167 states have call successors, (167), 38 states have call predecessors, (167), 37 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:32:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 592 transitions. [2024-09-13 00:32:24,630 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 592 transitions. Word has length 159 [2024-09-13 00:32:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:24,631 INFO L474 AbstractCegarLoop]: Abstraction has 434 states and 592 transitions. [2024-09-13 00:32:24,631 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:24,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 592 transitions. [2024-09-13 00:32:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:24,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:24,633 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:24,650 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:24,834 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 00:32:24,834 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:24,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-13 00:32:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:24,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631690606] [2024-09-13 00:32:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699974706] [2024-09-13 00:32:24,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:32:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:24,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:24,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 00:32:24,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 00:32:24,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:24,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:32:24,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-09-13 00:32:28,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:34,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631690606] [2024-09-13 00:32:34,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699974706] [2024-09-13 00:32:34,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699974706] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:34,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:34,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:32:34,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128731460] [2024-09-13 00:32:34,825 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:34,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:32:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:32:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:32:34,826 INFO L87 Difference]: Start difference. First operand 434 states and 592 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:40,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:32:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:41,337 INFO L93 Difference]: Finished difference Result 486 states and 661 transitions. [2024-09-13 00:32:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:32:41,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 159 [2024-09-13 00:32:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:41,340 INFO L225 Difference]: With dead ends: 486 [2024-09-13 00:32:41,340 INFO L226 Difference]: Without dead ends: 484 [2024-09-13 00:32:41,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=144, Invalid=977, Unknown=1, NotChecked=0, Total=1122 [2024-09-13 00:32:41,341 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:41,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 809 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-13 00:32:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-13 00:32:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 454. [2024-09-13 00:32:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 250 states have internal predecessors, (277), 168 states have call successors, (168), 42 states have call predecessors, (168), 41 states have return successors, (165), 161 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:32:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 610 transitions. [2024-09-13 00:32:41,803 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 610 transitions. Word has length 159 [2024-09-13 00:32:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:41,803 INFO L474 AbstractCegarLoop]: Abstraction has 454 states and 610 transitions. [2024-09-13 00:32:41,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:41,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 610 transitions. [2024-09-13 00:32:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-13 00:32:41,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:41,805 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:41,817 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:42,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:42,005 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:42,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-13 00:32:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093861103] [2024-09-13 00:32:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328058433] [2024-09-13 00:32:42,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:32:42,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:42,032 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:42,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 00:32:42,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:32:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:42,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:32:42,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-13 00:32:42,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-13 00:32:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093861103] [2024-09-13 00:32:42,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328058433] [2024-09-13 00:32:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328058433] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:32:42,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:32:42,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-13 00:32:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324845247] [2024-09-13 00:32:42,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:42,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:32:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:32:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:32:42,989 INFO L87 Difference]: Start difference. First operand 454 states and 610 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:45,949 INFO L93 Difference]: Finished difference Result 508 states and 685 transitions. [2024-09-13 00:32:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-13 00:32:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:45,953 INFO L225 Difference]: With dead ends: 508 [2024-09-13 00:32:45,953 INFO L226 Difference]: Without dead ends: 495 [2024-09-13 00:32:45,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:45,954 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 71 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:45,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 505 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 00:32:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-09-13 00:32:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 470. [2024-09-13 00:32:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 256 states have (on average 1.12890625) internal successors, (289), 263 states have internal predecessors, (289), 171 states have call successors, (171), 43 states have call predecessors, (171), 42 states have return successors, (169), 163 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-13 00:32:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 629 transitions. [2024-09-13 00:32:46,457 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 629 transitions. Word has length 164 [2024-09-13 00:32:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:46,457 INFO L474 AbstractCegarLoop]: Abstraction has 470 states and 629 transitions. [2024-09-13 00:32:46,457 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:46,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 629 transitions. [2024-09-13 00:32:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-13 00:32:46,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:46,459 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2024-09-13 00:32:46,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:46,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 00:32:46,660 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:46,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 7 times [2024-09-13 00:32:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:46,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996464274] [2024-09-13 00:32:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:46,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:46,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14111131] [2024-09-13 00:32:46,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:32:46,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:46,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:46,687 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 00:32:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:46,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-13 00:32:46,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2024-09-13 00:32:48,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996464274] [2024-09-13 00:32:57,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14111131] [2024-09-13 00:32:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14111131] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:57,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:32:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787487342] [2024-09-13 00:32:57,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:57,872 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:32:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:32:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-09-13 00:32:57,873 INFO L87 Difference]: Start difference. First operand 470 states and 629 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:59,707 INFO L93 Difference]: Finished difference Result 515 states and 689 transitions. [2024-09-13 00:32:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:32:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Word has length 175 [2024-09-13 00:32:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:59,710 INFO L225 Difference]: With dead ends: 515 [2024-09-13 00:32:59,710 INFO L226 Difference]: Without dead ends: 513 [2024-09-13 00:32:59,710 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 00:32:59,711 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:59,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 639 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:32:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-09-13 00:33:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2024-09-13 00:33:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 276 states have (on average 1.1304347826086956) internal successors, (312), 283 states have internal predecessors, (312), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-13 00:33:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2024-09-13 00:33:00,268 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 175 [2024-09-13 00:33:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:00,268 INFO L474 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2024-09-13 00:33:00,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:33:00,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2024-09-13 00:33:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-09-13 00:33:00,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:00,271 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:00,287 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 00:33:00,471 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 00:33:00,472 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:00,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash -942115888, now seen corresponding path program 8 times [2024-09-13 00:33:00,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:00,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856891518] [2024-09-13 00:33:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:00,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808502347] [2024-09-13 00:33:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:00,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:00,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:00,498 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:00,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 00:33:00,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:00,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:00,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-13 00:33:00,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 219 proven. 170 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-13 00:33:02,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856891518] [2024-09-13 00:33:02,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808502347] [2024-09-13 00:33:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808502347] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:02,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:33:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314899906] [2024-09-13 00:33:02,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:02,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:33:02,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:33:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:33:02,578 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:33:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:04,567 INFO L93 Difference]: Finished difference Result 564 states and 752 transitions. [2024-09-13 00:33:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:33:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) Word has length 178 [2024-09-13 00:33:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:04,571 INFO L225 Difference]: With dead ends: 564 [2024-09-13 00:33:04,571 INFO L226 Difference]: Without dead ends: 562 [2024-09-13 00:33:04,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:33:04,572 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:04,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 990 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:33:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-09-13 00:33:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 557. [2024-09-13 00:33:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 302 states have (on average 1.1291390728476822) internal successors, (341), 309 states have internal predecessors, (341), 203 states have call successors, (203), 52 states have call predecessors, (203), 51 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:33:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 745 transitions. [2024-09-13 00:33:05,444 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 745 transitions. Word has length 178 [2024-09-13 00:33:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:05,445 INFO L474 AbstractCegarLoop]: Abstraction has 557 states and 745 transitions. [2024-09-13 00:33:05,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:33:05,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 745 transitions. [2024-09-13 00:33:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:33:05,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:05,447 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2024-09-13 00:33:05,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 00:33:05,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 00:33:05,648 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:05,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1646591799, now seen corresponding path program 6 times [2024-09-13 00:33:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599464176] [2024-09-13 00:33:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:05,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829673146] [2024-09-13 00:33:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:33:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:05,669 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:05,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 00:33:05,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:33:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:05,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:33:05,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 127 proven. 132 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-13 00:33:21,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:24,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599464176] [2024-09-13 00:33:24,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:24,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829673146] [2024-09-13 00:33:24,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829673146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:24,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:24,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:33:24,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765481053] [2024-09-13 00:33:24,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:24,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:33:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:33:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=507, Unknown=3, NotChecked=0, Total=600 [2024-09-13 00:33:24,009 INFO L87 Difference]: Start difference. First operand 557 states and 745 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:33:26,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:28,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:30,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:33,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:40,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:43,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:46,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:50,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:55,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:59,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:10,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:14,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:18,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:22,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:26,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:31,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:36,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:40,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:44,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:49,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:53,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:57,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:58,821 INFO L93 Difference]: Finished difference Result 579 states and 763 transitions. [2024-09-13 00:34:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:34:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 181 [2024-09-13 00:34:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:58,825 INFO L225 Difference]: With dead ends: 579 [2024-09-13 00:34:58,825 INFO L226 Difference]: Without dead ends: 572 [2024-09-13 00:34:58,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=133, Invalid=733, Unknown=4, NotChecked=0, Total=870 [2024-09-13 00:34:58,826 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 26 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:58,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 606 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 514 Invalid, 14 Unknown, 0 Unchecked, 81.5s Time] [2024-09-13 00:34:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-13 00:34:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 569. [2024-09-13 00:34:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 318 states have internal predecessors, (349), 203 states have call successors, (203), 55 states have call predecessors, (203), 54 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:34:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 753 transitions. [2024-09-13 00:34:59,658 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 753 transitions. Word has length 181 [2024-09-13 00:34:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:59,658 INFO L474 AbstractCegarLoop]: Abstraction has 569 states and 753 transitions. [2024-09-13 00:34:59,659 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:34:59,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 753 transitions. [2024-09-13 00:34:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:34:59,661 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:59,661 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2024-09-13 00:34:59,685 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-13 00:34:59,861 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 00:34:59,862 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:59,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash -468699879, now seen corresponding path program 7 times [2024-09-13 00:34:59,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:59,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732623017] [2024-09-13 00:34:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:59,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412890508] [2024-09-13 00:34:59,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:34:59,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:59,890 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:59,893 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 00:34:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:34:59,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:35:00,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 119 proven. 110 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2024-09-13 00:35:02,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:07,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:07,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732623017] [2024-09-13 00:35:07,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:07,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412890508] [2024-09-13 00:35:07,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412890508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:07,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:07,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:35:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804093906] [2024-09-13 00:35:07,189 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:07,189 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:35:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:35:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:35:07,190 INFO L87 Difference]: Start difference. First operand 569 states and 753 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:35:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:12,649 INFO L93 Difference]: Finished difference Result 616 states and 823 transitions. [2024-09-13 00:35:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:35:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 181 [2024-09-13 00:35:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:12,653 INFO L225 Difference]: With dead ends: 616 [2024-09-13 00:35:12,653 INFO L226 Difference]: Without dead ends: 609 [2024-09-13 00:35:12,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 00:35:12,654 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 45 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:12,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 763 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-09-13 00:35:12,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-13 00:35:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 582. [2024-09-13 00:35:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 319 states have (on average 1.1222570532915361) internal successors, (358), 326 states have internal predecessors, (358), 207 states have call successors, (207), 56 states have call predecessors, (207), 55 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-13 00:35:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 770 transitions. [2024-09-13 00:35:13,554 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 770 transitions. Word has length 181 [2024-09-13 00:35:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:13,555 INFO L474 AbstractCegarLoop]: Abstraction has 582 states and 770 transitions. [2024-09-13 00:35:13,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:35:13,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 770 transitions. [2024-09-13 00:35:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:35:13,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:13,558 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2024-09-13 00:35:13,576 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-13 00:35:13,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:13,758 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:13,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1752760443, now seen corresponding path program 8 times [2024-09-13 00:35:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:13,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025691471] [2024-09-13 00:35:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327238211] [2024-09-13 00:35:13,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:35:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:13,781 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:13,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 00:35:13,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:35:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:13,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:35:13,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 101 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2024-09-13 00:35:16,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025691471] [2024-09-13 00:35:20,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327238211] [2024-09-13 00:35:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327238211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:20,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:20,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:35:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848814314] [2024-09-13 00:35:20,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:20,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:35:20,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:35:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:35:20,097 INFO L87 Difference]: Start difference. First operand 582 states and 770 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:35:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:22,648 INFO L93 Difference]: Finished difference Result 634 states and 844 transitions. [2024-09-13 00:35:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:35:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 181 [2024-09-13 00:35:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:22,652 INFO L225 Difference]: With dead ends: 634 [2024-09-13 00:35:22,652 INFO L226 Difference]: Without dead ends: 627 [2024-09-13 00:35:22,652 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:35:22,653 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 36 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:22,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1001 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 00:35:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2024-09-13 00:35:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 599. [2024-09-13 00:35:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 330 states have (on average 1.121212121212121) internal successors, (370), 337 states have internal predecessors, (370), 211 states have call successors, (211), 58 states have call predecessors, (211), 57 states have return successors, (209), 203 states have call predecessors, (209), 209 states have call successors, (209) [2024-09-13 00:35:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 790 transitions. [2024-09-13 00:35:23,353 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 790 transitions. Word has length 181 [2024-09-13 00:35:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:23,353 INFO L474 AbstractCegarLoop]: Abstraction has 599 states and 790 transitions. [2024-09-13 00:35:23,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:35:23,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 790 transitions. [2024-09-13 00:35:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-09-13 00:35:23,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:23,355 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2024-09-13 00:35:23,368 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:23,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 00:35:23,555 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:23,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 58480029, now seen corresponding path program 9 times [2024-09-13 00:35:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:23,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741343104] [2024-09-13 00:35:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478209686] [2024-09-13 00:35:23,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:35:23,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:23,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:23,592 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:23,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 00:35:23,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 00:35:23,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:23,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-13 00:35:23,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 148 proven. 152 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2024-09-13 00:35:24,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 201 proven. 68 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2024-09-13 00:35:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741343104] [2024-09-13 00:35:27,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478209686] [2024-09-13 00:35:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478209686] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:35:27,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:35:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2024-09-13 00:35:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985261019] [2024-09-13 00:35:27,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:27,262 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 00:35:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:27,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 00:35:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:35:27,263 INFO L87 Difference]: Start difference. First operand 599 states and 790 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:35:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:37,934 INFO L93 Difference]: Finished difference Result 661 states and 870 transitions. [2024-09-13 00:35:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-13 00:35:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) Word has length 184 [2024-09-13 00:35:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:37,937 INFO L225 Difference]: With dead ends: 661 [2024-09-13 00:35:37,937 INFO L226 Difference]: Without dead ends: 653 [2024-09-13 00:35:37,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 00:35:37,939 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 128 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:37,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 803 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-09-13 00:35:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2024-09-13 00:35:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 642. [2024-09-13 00:35:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 353 states have (on average 1.1218130311614731) internal successors, (396), 360 states have internal predecessors, (396), 227 states have call successors, (227), 62 states have call predecessors, (227), 61 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:35:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 848 transitions. [2024-09-13 00:35:38,794 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 848 transitions. Word has length 184 [2024-09-13 00:35:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:38,794 INFO L474 AbstractCegarLoop]: Abstraction has 642 states and 848 transitions. [2024-09-13 00:35:38,794 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:35:38,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 848 transitions. [2024-09-13 00:35:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:35:38,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:38,796 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 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] [2024-09-13 00:35:38,802 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-13 00:35:39,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:39,001 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:39,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash 735942281, now seen corresponding path program 9 times [2024-09-13 00:35:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:39,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042287652] [2024-09-13 00:35:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:39,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:39,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586100666] [2024-09-13 00:35:39,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:35:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:39,020 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:39,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 00:35:39,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:35:39,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:39,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 00:35:39,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 223 proven. 72 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2024-09-13 00:35:40,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:40,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:40,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042287652] [2024-09-13 00:35:40,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:40,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586100666] [2024-09-13 00:35:40,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586100666] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:40,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:40,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:35:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771021093] [2024-09-13 00:35:40,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:40,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:35:40,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:35:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-13 00:35:40,523 INFO L87 Difference]: Start difference. First operand 642 states and 848 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:35:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:42,215 INFO L93 Difference]: Finished difference Result 671 states and 871 transitions. [2024-09-13 00:35:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:35:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 197 [2024-09-13 00:35:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:42,218 INFO L225 Difference]: With dead ends: 671 [2024-09-13 00:35:42,218 INFO L226 Difference]: Without dead ends: 669 [2024-09-13 00:35:42,219 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:35:42,219 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:42,219 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 577 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:35:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2024-09-13 00:35:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 666. [2024-09-13 00:35:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 371 states have (on average 1.1159029649595686) internal successors, (414), 378 states have internal predecessors, (414), 227 states have call successors, (227), 68 states have call predecessors, (227), 67 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:35:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 866 transitions. [2024-09-13 00:35:43,063 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 866 transitions. Word has length 197 [2024-09-13 00:35:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:43,063 INFO L474 AbstractCegarLoop]: Abstraction has 666 states and 866 transitions. [2024-09-13 00:35:43,063 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:35:43,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 866 transitions. [2024-09-13 00:35:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:35:43,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:43,066 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 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] [2024-09-13 00:35:43,080 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-13 00:35:43,266 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:43,266 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:43,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -659240853, now seen corresponding path program 10 times [2024-09-13 00:35:43,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:43,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73488618] [2024-09-13 00:35:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373765818] [2024-09-13 00:35:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:35:43,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:43,298 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:43,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 00:35:43,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:35:43,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:43,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 00:35:43,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 136 proven. 195 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2024-09-13 00:35:44,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:45,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73488618] [2024-09-13 00:35:45,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:45,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373765818] [2024-09-13 00:35:45,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373765818] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:45,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:45,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:35:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879814997] [2024-09-13 00:35:45,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:45,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:35:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:45,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:35:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:35:45,308 INFO L87 Difference]: Start difference. First operand 666 states and 866 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:35:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:47,384 INFO L93 Difference]: Finished difference Result 711 states and 926 transitions. [2024-09-13 00:35:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:35:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) Word has length 197 [2024-09-13 00:35:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:47,388 INFO L225 Difference]: With dead ends: 711 [2024-09-13 00:35:47,388 INFO L226 Difference]: Without dead ends: 709 [2024-09-13 00:35:47,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:35:47,389 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:47,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 948 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 00:35:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2024-09-13 00:35:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2024-09-13 00:35:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 375 states have (on average 1.1146666666666667) internal successors, (418), 383 states have internal predecessors, (418), 229 states have call successors, (229), 69 states have call predecessors, (229), 68 states have return successors, (227), 220 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-13 00:35:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 874 transitions. [2024-09-13 00:35:48,268 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 874 transitions. Word has length 197 [2024-09-13 00:35:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:48,268 INFO L474 AbstractCegarLoop]: Abstraction has 673 states and 874 transitions. [2024-09-13 00:35:48,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:35:48,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 874 transitions. [2024-09-13 00:35:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:35:48,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:48,270 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:48,283 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:48,470 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-13 00:35:48,471 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:48,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2074926545, now seen corresponding path program 11 times [2024-09-13 00:35:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445947813] [2024-09-13 00:35:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:48,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27214643] [2024-09-13 00:35:48,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:35:48,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:48,493 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:48,495 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 00:35:48,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 00:35:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:48,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-09-13 00:35:48,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 242 proven. 223 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2024-09-13 00:35:51,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445947813] [2024-09-13 00:35:51,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27214643] [2024-09-13 00:35:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27214643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:51,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:51,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 00:35:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664965159] [2024-09-13 00:35:51,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:51,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 00:35:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 00:35:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:35:51,787 INFO L87 Difference]: Start difference. First operand 673 states and 874 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:35:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:54,975 INFO L93 Difference]: Finished difference Result 746 states and 976 transitions. [2024-09-13 00:35:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:35:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) Word has length 200 [2024-09-13 00:35:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:54,978 INFO L225 Difference]: With dead ends: 746 [2024-09-13 00:35:54,978 INFO L226 Difference]: Without dead ends: 744 [2024-09-13 00:35:54,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:35:54,979 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 38 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:54,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1060 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 00:35:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2024-09-13 00:35:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 688. [2024-09-13 00:35:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 384 states have (on average 1.1145833333333333) internal successors, (428), 391 states have internal predecessors, (428), 233 states have call successors, (233), 71 states have call predecessors, (233), 70 states have return successors, (231), 225 states have call predecessors, (231), 231 states have call successors, (231) [2024-09-13 00:35:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 892 transitions. [2024-09-13 00:35:55,848 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 892 transitions. Word has length 200 [2024-09-13 00:35:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:55,848 INFO L474 AbstractCegarLoop]: Abstraction has 688 states and 892 transitions. [2024-09-13 00:35:55,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 18 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 13 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:35:55,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 892 transitions. [2024-09-13 00:35:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:35:55,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:55,850 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:55,856 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:56,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:56,050 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:56,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 572704943, now seen corresponding path program 12 times [2024-09-13 00:35:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:56,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917713941] [2024-09-13 00:35:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:56,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:56,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863509011] [2024-09-13 00:35:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:35:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:56,070 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:56,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 00:35:56,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:35:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:56,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 00:35:56,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 282 proven. 45 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2024-09-13 00:36:18,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917713941] [2024-09-13 00:36:18,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863509011] [2024-09-13 00:36:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863509011] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:18,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:18,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:36:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700088466] [2024-09-13 00:36:18,889 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:18,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:36:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:36:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=424, Unknown=2, NotChecked=0, Total=506 [2024-09-13 00:36:18,890 INFO L87 Difference]: Start difference. First operand 688 states and 892 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:36:23,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:27,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:35,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:39,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:43,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:46,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:50,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:58,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:04,652 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 49 DAG size of output: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:37:07,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:11,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:23,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:28,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:32,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:36,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:50,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:54,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] Killed by 15