./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd2-ll.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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:33:31,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:33:31,218 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:33:31,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:33:31,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:33:31,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:33:31,257 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:33:31,257 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:33:31,258 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:33:31,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:33:31,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:33:31,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:33:31,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:33:31,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:33:31,260 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:33:31,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:33:31,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:33:31,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:33:31,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:33:31,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:33:31,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:33:31,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:33:31,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:33:31,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:33:31,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:33:31,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:33:31,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:33:31,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:33:31,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:33:31,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:33:31,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:33:31,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:33:31,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:33:31,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:33:31,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:33:31,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:33:31,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:33:31,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:33:31,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:33:31,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:33:31,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:33:31,558 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:33:31,558 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:33:31,559 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-10-15 14:33:32,969 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:33:33,182 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:33:33,183 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-10-15 14:33:33,192 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2af87e2f9/8cdbbac7b83849dea1cc6cc0f32b4929/FLAG02b2b612e [2024-10-15 14:33:33,576 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2af87e2f9/8cdbbac7b83849dea1cc6cc0f32b4929 [2024-10-15 14:33:33,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:33:33,581 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:33:33,583 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:33:33,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:33:33,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:33:33,590 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194d7504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33, skipping insertion in model container [2024-10-15 14:33:33,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,612 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:33:33,789 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-10-15 14:33:33,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:33:33,814 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:33:33,824 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-10-15 14:33:33,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:33:33,851 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:33:33,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33 WrapperNode [2024-10-15 14:33:33,851 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:33:33,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:33:33,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:33:33,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:33:33,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,868 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:33:33,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:33:33,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:33:33,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:33:33,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:33:33,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,889 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-15 14:33:33,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,897 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,900 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:33:33,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:33:33,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:33:33,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:33:33,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (1/1) ... [2024-10-15 14:33:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:33:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:33,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 14:33:33,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 14:33:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:33:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:33:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:33:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:33:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:33:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:33:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:33:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:33:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:33:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:33:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:33:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:33:34,029 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:33:34,031 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:33:34,201 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-15 14:33:34,202 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:33:34,221 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:33:34,222 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 14:33:34,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:33:34 BoogieIcfgContainer [2024-10-15 14:33:34,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:33:34,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:33:34,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:33:34,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:33:34,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:33:33" (1/3) ... [2024-10-15 14:33:34,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b375ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:33:34, skipping insertion in model container [2024-10-15 14:33:34,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:33:33" (2/3) ... [2024-10-15 14:33:34,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b375ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:33:34, skipping insertion in model container [2024-10-15 14:33:34,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:33:34" (3/3) ... [2024-10-15 14:33:34,234 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-10-15 14:33:34,249 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:33:34,249 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:33:34,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:33:34,303 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f46056d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:33:34,304 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:33:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 14:33:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-15 14:33:34,314 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:34,315 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:34,316 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:34,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1130788706, now seen corresponding path program 1 times [2024-10-15 14:33:34,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:34,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858627881] [2024-10-15 14:33:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,454 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:33:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:33:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,476 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:33:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:33:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:33:34,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:34,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858627881] [2024-10-15 14:33:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858627881] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:33:34,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:33:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:33:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743087269] [2024-10-15 14:33:34,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:33:34,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:33:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:33:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:33:34,542 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:33:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:34,574 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2024-10-15 14:33:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:33:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-10-15 14:33:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:34,589 INFO L225 Difference]: With dead ends: 64 [2024-10-15 14:33:34,589 INFO L226 Difference]: Without dead ends: 31 [2024-10-15 14:33:34,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:33:34,598 INFO L432 NwaCegarLoop]: 42 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, 42 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 [2024-10-15 14:33:34,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:33:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-15 14:33:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-15 14:33:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-15 14:33:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-10-15 14:33:34,646 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 31 [2024-10-15 14:33:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:34,647 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-10-15 14:33:34,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:33:34,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-10-15 14:33:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:33:34,650 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:34,651 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:34,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:33:34,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:34,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1704590499, now seen corresponding path program 1 times [2024-10-15 14:33:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:34,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94183097] [2024-10-15 14:33:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:33:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:33:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:33:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:33:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:33:34,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:34,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94183097] [2024-10-15 14:33:34,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94183097] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:34,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616652328] [2024-10-15 14:33:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:34,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:34,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:34,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:34,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:33:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:35,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:33:35,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:33:35,249 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:33:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616652328] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:33:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:33:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-15 14:33:35,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929599450] [2024-10-15 14:33:35,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:33:35,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:33:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:35,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:33:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:33:35,256 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:33:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:35,381 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2024-10-15 14:33:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:33:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-10-15 14:33:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:35,384 INFO L225 Difference]: With dead ends: 48 [2024-10-15 14:33:35,384 INFO L226 Difference]: Without dead ends: 46 [2024-10-15 14:33:35,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:33:35,385 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:35,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-15 14:33:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2024-10-15 14:33:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-10-15 14:33:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2024-10-15 14:33:35,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 32 [2024-10-15 14:33:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:35,407 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2024-10-15 14:33:35,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-15 14:33:35,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2024-10-15 14:33:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:33:35,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:35,413 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:35,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 14:33:35,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:35,618 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:35,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1312615442, now seen corresponding path program 1 times [2024-10-15 14:33:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919723201] [2024-10-15 14:33:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:35,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928967482] [2024-10-15 14:33:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:35,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:35,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:33:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:35,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:33:35,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:33:35,748 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:33:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919723201] [2024-10-15 14:33:35,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928967482] [2024-10-15 14:33:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928967482] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:33:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:33:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:33:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967568354] [2024-10-15 14:33:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:33:35,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:33:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:33:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:33:35,752 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:33:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:35,815 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2024-10-15 14:33:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:33:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-10-15 14:33:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:35,818 INFO L225 Difference]: With dead ends: 63 [2024-10-15 14:33:35,818 INFO L226 Difference]: Without dead ends: 61 [2024-10-15 14:33:35,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:33:35,820 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:35,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:33:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-15 14:33:35,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-10-15 14:33:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:33:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2024-10-15 14:33:35,835 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 33 [2024-10-15 14:33:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:35,835 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2024-10-15 14:33:35,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:33:35,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2024-10-15 14:33:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-15 14:33:35,837 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:35,837 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:35,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 14:33:36,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:36,042 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:36,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1674155548, now seen corresponding path program 1 times [2024-10-15 14:33:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401955953] [2024-10-15 14:33:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:33:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:33:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:33:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:33:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-15 14:33:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:33:36,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401955953] [2024-10-15 14:33:36,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401955953] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724946320] [2024-10-15 14:33:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:36,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:36,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:36,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:36,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:33:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:33:36,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:33:36,328 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:33:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724946320] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:33:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:33:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-10-15 14:33:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051406060] [2024-10-15 14:33:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:33:36,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:33:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:33:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:33:36,332 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:33:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:36,434 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-10-15 14:33:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:33:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-10-15 14:33:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:36,437 INFO L225 Difference]: With dead ends: 60 [2024-10-15 14:33:36,440 INFO L226 Difference]: Without dead ends: 56 [2024-10-15 14:33:36,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:33:36,441 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:36,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-15 14:33:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-15 14:33:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-15 14:33:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-10-15 14:33:36,464 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2024-10-15 14:33:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:36,464 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-10-15 14:33:36,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 14:33:36,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-10-15 14:33:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 14:33:36,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:36,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:36,483 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:33:36,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:36,667 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:36,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1754125331, now seen corresponding path program 1 times [2024-10-15 14:33:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523501425] [2024-10-15 14:33:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:36,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546535828] [2024-10-15 14:33:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:36,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:36,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:36,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:36,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:33:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:36,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-15 14:33:36,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-15 14:33:36,894 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:33:36,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523501425] [2024-10-15 14:33:36,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546535828] [2024-10-15 14:33:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546535828] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:33:36,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:33:36,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:33:36,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683451965] [2024-10-15 14:33:36,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:33:36,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:33:36,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:36,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:33:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:33:36,898 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-10-15 14:33:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:37,052 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-10-15 14:33:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:33:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 48 [2024-10-15 14:33:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:37,055 INFO L225 Difference]: With dead ends: 62 [2024-10-15 14:33:37,055 INFO L226 Difference]: Without dead ends: 60 [2024-10-15 14:33:37,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:33:37,056 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:37,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-15 14:33:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-15 14:33:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-15 14:33:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-10-15 14:33:37,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 48 [2024-10-15 14:33:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:37,074 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-10-15 14:33:37,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2024-10-15 14:33:37,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-10-15 14:33:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:33:37,076 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:37,076 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:37,093 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:37,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:37,281 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:37,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash -914162351, now seen corresponding path program 1 times [2024-10-15 14:33:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:37,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718370717] [2024-10-15 14:33:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:37,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:37,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910509517] [2024-10-15 14:33:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:37,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:37,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:37,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:33:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:37,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-15 14:33:37,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-15 14:33:37,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-15 14:33:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718370717] [2024-10-15 14:33:37,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910509517] [2024-10-15 14:33:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910509517] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:37,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:33:37,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-10-15 14:33:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385445286] [2024-10-15 14:33:37,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:37,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:33:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:33:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:33:37,597 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:33:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:37,744 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2024-10-15 14:33:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:33:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-10-15 14:33:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:37,748 INFO L225 Difference]: With dead ends: 87 [2024-10-15 14:33:37,748 INFO L226 Difference]: Without dead ends: 85 [2024-10-15 14:33:37,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:33:37,749 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 203 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 [2024-10-15 14:33:37,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 203 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-15 14:33:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2024-10-15 14:33:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-15 14:33:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-15 14:33:37,778 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 55 [2024-10-15 14:33:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:37,778 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-15 14:33:37,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:33:37,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-15 14:33:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-15 14:33:37,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:37,780 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:37,800 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 14:33:37,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:33:37,988 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:37,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -268943045, now seen corresponding path program 1 times [2024-10-15 14:33:37,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:37,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930277708] [2024-10-15 14:33:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:37,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:33:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,107 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:33:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:33:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:33:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:33:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:33:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:33:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:33:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-15 14:33:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:33:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930277708] [2024-10-15 14:33:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930277708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781962704] [2024-10-15 14:33:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:38,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:38,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:38,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:38,159 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:33:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:33:38,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:33:38,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:33:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781962704] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:38,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:33:38,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-15 14:33:38,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448952886] [2024-10-15 14:33:38,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:38,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:33:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:33:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:33:38,364 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-15 14:33:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:38,567 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-10-15 14:33:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:33:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2024-10-15 14:33:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:38,569 INFO L225 Difference]: With dead ends: 102 [2024-10-15 14:33:38,569 INFO L226 Difference]: Without dead ends: 94 [2024-10-15 14:33:38,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-15 14:33:38,570 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:38,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:33:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-15 14:33:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2024-10-15 14:33:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 8 states have call predecessors, (32), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-10-15 14:33:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 116 transitions. [2024-10-15 14:33:38,609 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 116 transitions. Word has length 57 [2024-10-15 14:33:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:38,609 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 116 transitions. [2024-10-15 14:33:38,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-15 14:33:38,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 116 transitions. [2024-10-15 14:33:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 14:33:38,611 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:38,611 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:38,627 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:33:38,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:38,812 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:38,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2145912741, now seen corresponding path program 1 times [2024-10-15 14:33:38,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:38,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895706813] [2024-10-15 14:33:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:38,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791354186] [2024-10-15 14:33:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:38,835 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:38,836 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 14:33:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:33:38,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-15 14:33:38,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:33:39,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-15 14:33:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895706813] [2024-10-15 14:33:39,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791354186] [2024-10-15 14:33:39,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791354186] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:39,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:33:39,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-10-15 14:33:39,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349035413] [2024-10-15 14:33:39,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:39,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:33:39,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:33:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:33:39,395 INFO L87 Difference]: Start difference. First operand 85 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-10-15 14:33:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:40,465 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-10-15 14:33:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:33:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 63 [2024-10-15 14:33:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:40,469 INFO L225 Difference]: With dead ends: 136 [2024-10-15 14:33:40,469 INFO L226 Difference]: Without dead ends: 133 [2024-10-15 14:33:40,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:33:40,470 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:40,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:33:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-15 14:33:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-10-15 14:33:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 49 states have call successors, (49), 9 states have call predecessors, (49), 8 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-10-15 14:33:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2024-10-15 14:33:40,523 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 63 [2024-10-15 14:33:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:40,523 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2024-10-15 14:33:40,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-10-15 14:33:40,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2024-10-15 14:33:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-15 14:33:40,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:40,525 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:40,542 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 14:33:40,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:40,730 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:40,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009882, now seen corresponding path program 2 times [2024-10-15 14:33:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:40,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87024907] [2024-10-15 14:33:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:40,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426458059] [2024-10-15 14:33:40,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:33:40,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:40,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:40,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 14:33:40,808 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:33:40,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:40,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-15 14:33:40,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-15 14:33:41,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:33:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87024907] [2024-10-15 14:33:41,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426458059] [2024-10-15 14:33:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426458059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:33:41,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:33:41,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-10-15 14:33:41,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204721060] [2024-10-15 14:33:41,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:41,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:33:41,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:33:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:33:41,469 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-10-15 14:33:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:33:42,768 INFO L93 Difference]: Finished difference Result 243 states and 366 transitions. [2024-10-15 14:33:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:33:42,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 68 [2024-10-15 14:33:42,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:33:42,774 INFO L225 Difference]: With dead ends: 243 [2024-10-15 14:33:42,775 INFO L226 Difference]: Without dead ends: 241 [2024-10-15 14:33:42,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:33:42,777 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:33:42,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 287 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:33:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-10-15 14:33:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2024-10-15 14:33:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 112 states have internal predecessors, (137), 85 states have call successors, (85), 11 states have call predecessors, (85), 10 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2024-10-15 14:33:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2024-10-15 14:33:42,863 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 68 [2024-10-15 14:33:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:33:42,864 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2024-10-15 14:33:42,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-10-15 14:33:42,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2024-10-15 14:33:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-15 14:33:42,868 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:33:42,868 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:33:42,887 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 14:33:43,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:43,073 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:33:43,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:33:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1448853371, now seen corresponding path program 3 times [2024-10-15 14:33:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:33:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467593407] [2024-10-15 14:33:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:33:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:33:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:33:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191379007] [2024-10-15 14:33:43,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:33:43,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:33:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:33:43,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:33:43,104 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 14:33:43,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:33:43,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:33:43,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-15 14:33:43,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:33:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 14:33:44,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:33:59,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:33:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467593407] [2024-10-15 14:33:59,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:33:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191379007] [2024-10-15 14:33:59,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191379007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:33:59,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:33:59,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:33:59,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111222137] [2024-10-15 14:33:59,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:33:59,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:33:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:33:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:33:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-10-15 14:33:59,156 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-15 14:34:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:00,990 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2024-10-15 14:34:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:34:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2024-10-15 14:34:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:00,993 INFO L225 Difference]: With dead ends: 227 [2024-10-15 14:34:00,993 INFO L226 Difference]: Without dead ends: 225 [2024-10-15 14:34:00,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:34:00,994 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:00,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:34:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-10-15 14:34:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2024-10-15 14:34:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 89 states have call successors, (89), 14 states have call predecessors, (89), 13 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-10-15 14:34:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2024-10-15 14:34:01,065 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 73 [2024-10-15 14:34:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:01,065 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2024-10-15 14:34:01,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-15 14:34:01,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2024-10-15 14:34:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-15 14:34:01,067 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:01,068 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2024-10-15 14:34:01,086 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 14:34:01,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 14:34:01,272 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:01,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 910050682, now seen corresponding path program 1 times [2024-10-15 14:34:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:01,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690870783] [2024-10-15 14:34:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080023487] [2024-10-15 14:34:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:01,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:01,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:01,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:01,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 14:34:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:01,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-15 14:34:01,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-15 14:34:01,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-15 14:34:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690870783] [2024-10-15 14:34:02,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080023487] [2024-10-15 14:34:02,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080023487] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:02,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:02,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-15 14:34:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879261083] [2024-10-15 14:34:02,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:02,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:34:02,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:34:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:34:02,625 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-10-15 14:34:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:05,586 INFO L93 Difference]: Finished difference Result 353 states and 532 transitions. [2024-10-15 14:34:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:34:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 79 [2024-10-15 14:34:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:05,589 INFO L225 Difference]: With dead ends: 353 [2024-10-15 14:34:05,589 INFO L226 Difference]: Without dead ends: 349 [2024-10-15 14:34:05,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 14:34:05,594 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:05,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 609 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-15 14:34:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-10-15 14:34:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2024-10-15 14:34:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 181 states have internal predecessors, (225), 150 states have call successors, (150), 17 states have call predecessors, (150), 16 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-10-15 14:34:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2024-10-15 14:34:05,748 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 79 [2024-10-15 14:34:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:05,748 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2024-10-15 14:34:05,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-10-15 14:34:05,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2024-10-15 14:34:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-15 14:34:05,750 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:05,750 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-10-15 14:34:05,763 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:05,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 14:34:05,952 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:05,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash 623896260, now seen corresponding path program 1 times [2024-10-15 14:34:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012214159] [2024-10-15 14:34:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:05,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245215510] [2024-10-15 14:34:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:05,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:05,979 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 14:34:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:06,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-15 14:34:06,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 68 proven. 35 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-10-15 14:34:07,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:08,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012214159] [2024-10-15 14:34:08,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245215510] [2024-10-15 14:34:08,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245215510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:08,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 14:34:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261087005] [2024-10-15 14:34:08,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:08,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:34:08,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:34:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:34:08,870 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-10-15 14:34:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:09,967 INFO L93 Difference]: Finished difference Result 358 states and 533 transitions. [2024-10-15 14:34:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:34:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 95 [2024-10-15 14:34:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:09,971 INFO L225 Difference]: With dead ends: 358 [2024-10-15 14:34:09,971 INFO L226 Difference]: Without dead ends: 356 [2024-10-15 14:34:09,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:34:09,972 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:09,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 369 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:34:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-10-15 14:34:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2024-10-15 14:34:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 184 states have (on average 1.2554347826086956) internal successors, (231), 187 states have internal predecessors, (231), 150 states have call successors, (150), 19 states have call predecessors, (150), 18 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-10-15 14:34:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 528 transitions. [2024-10-15 14:34:10,117 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 528 transitions. Word has length 95 [2024-10-15 14:34:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:10,117 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 528 transitions. [2024-10-15 14:34:10,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2024-10-15 14:34:10,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 528 transitions. [2024-10-15 14:34:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:34:10,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:10,119 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2024-10-15 14:34:10,136 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 14:34:10,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:10,319 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:10,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 658114285, now seen corresponding path program 4 times [2024-10-15 14:34:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855057462] [2024-10-15 14:34:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:34:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:34:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:34:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:34:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-15 14:34:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-15 14:34:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:34:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:34:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-15 14:34:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-15 14:34:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-15 14:34:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:34:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-10-15 14:34:10,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:10,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855057462] [2024-10-15 14:34:10,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855057462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:34:10,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:34:10,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:34:10,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419115419] [2024-10-15 14:34:10,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:34:10,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:34:10,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:34:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:34:10,474 INFO L87 Difference]: Start difference. First operand 353 states and 528 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2024-10-15 14:34:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:10,635 INFO L93 Difference]: Finished difference Result 426 states and 629 transitions. [2024-10-15 14:34:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:34:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 98 [2024-10-15 14:34:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:10,638 INFO L225 Difference]: With dead ends: 426 [2024-10-15 14:34:10,638 INFO L226 Difference]: Without dead ends: 230 [2024-10-15 14:34:10,640 INFO L431 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 [2024-10-15 14:34:10,640 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:10,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:34:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-10-15 14:34:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 206. [2024-10-15 14:34:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 112 states have internal predecessors, (126), 78 states have call successors, (78), 19 states have call predecessors, (78), 18 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-10-15 14:34:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 279 transitions. [2024-10-15 14:34:10,709 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 279 transitions. Word has length 98 [2024-10-15 14:34:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:10,709 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 279 transitions. [2024-10-15 14:34:10,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2024-10-15 14:34:10,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 279 transitions. [2024-10-15 14:34:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-10-15 14:34:10,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:10,711 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 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] [2024-10-15 14:34:10,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-15 14:34:10,712 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:10,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -825105347, now seen corresponding path program 1 times [2024-10-15 14:34:10,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:10,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848354027] [2024-10-15 14:34:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:34:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:34:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 14:34:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:34:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:34:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-15 14:34:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-15 14:34:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-15 14:34:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-15 14:34:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-15 14:34:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:34:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:34:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-15 14:34:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-15 14:34:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-10-15 14:34:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-10-15 14:34:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-15 14:34:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-10-15 14:34:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-15 14:34:10,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848354027] [2024-10-15 14:34:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848354027] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283354645] [2024-10-15 14:34:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:10,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:10,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:10,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 14:34:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:34:10,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:34:10,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2024-10-15 14:34:11,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-10-15 14:34:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283354645] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:11,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:34:11,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-10-15 14:34:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947566744] [2024-10-15 14:34:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:11,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:34:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:34:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:34:11,103 INFO L87 Difference]: Start difference. First operand 206 states and 279 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-10-15 14:34:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:11,399 INFO L93 Difference]: Finished difference Result 232 states and 318 transitions. [2024-10-15 14:34:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:34:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 109 [2024-10-15 14:34:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:11,401 INFO L225 Difference]: With dead ends: 232 [2024-10-15 14:34:11,401 INFO L226 Difference]: Without dead ends: 220 [2024-10-15 14:34:11,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 252 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:34:11,402 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:11,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 307 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:34:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-15 14:34:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2024-10-15 14:34:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 106 states have (on average 1.150943396226415) internal successors, (122), 108 states have internal predecessors, (122), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-10-15 14:34:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2024-10-15 14:34:11,484 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 109 [2024-10-15 14:34:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:11,484 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2024-10-15 14:34:11,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-10-15 14:34:11,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2024-10-15 14:34:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-15 14:34:11,486 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:11,486 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 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] [2024-10-15 14:34:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:11,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:34:11,687 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:11,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:11,687 INFO L85 PathProgramCache]: Analyzing trace with hash 429591308, now seen corresponding path program 2 times [2024-10-15 14:34:11,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449006998] [2024-10-15 14:34:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:11,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118618362] [2024-10-15 14:34:11,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:34:11,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:11,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:11,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 14:34:11,785 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:34:11,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:11,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 14:34:11,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2024-10-15 14:34:12,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449006998] [2024-10-15 14:34:12,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118618362] [2024-10-15 14:34:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118618362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:12,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:12,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 14:34:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402299340] [2024-10-15 14:34:12,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:12,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:34:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:34:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:34:12,634 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-15 14:34:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:13,414 INFO L93 Difference]: Finished difference Result 231 states and 316 transitions. [2024-10-15 14:34:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:34:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2024-10-15 14:34:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:13,417 INFO L225 Difference]: With dead ends: 231 [2024-10-15 14:34:13,417 INFO L226 Difference]: Without dead ends: 229 [2024-10-15 14:34:13,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2024-10-15 14:34:13,420 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:13,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 428 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:34:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-10-15 14:34:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2024-10-15 14:34:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2024-10-15 14:34:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2024-10-15 14:34:13,523 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 110 [2024-10-15 14:34:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:13,524 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2024-10-15 14:34:13,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-10-15 14:34:13,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2024-10-15 14:34:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:34:13,525 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:13,525 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:13,537 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:13,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:34:13,726 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:13,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1625892333, now seen corresponding path program 3 times [2024-10-15 14:34:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:13,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248076426] [2024-10-15 14:34:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:13,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532756914] [2024-10-15 14:34:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:34:13,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:13,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:13,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:13,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-15 14:34:13,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:34:13,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:13,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:34:13,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-10-15 14:34:14,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-10-15 14:34:15,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:15,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248076426] [2024-10-15 14:34:15,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:15,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532756914] [2024-10-15 14:34:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532756914] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:15,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:15,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2024-10-15 14:34:15,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406421323] [2024-10-15 14:34:15,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:15,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 14:34:15,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 14:34:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-10-15 14:34:15,529 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-10-15 14:34:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:18,217 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2024-10-15 14:34:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:34:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2024-10-15 14:34:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:18,220 INFO L225 Difference]: With dead ends: 267 [2024-10-15 14:34:18,220 INFO L226 Difference]: Without dead ends: 265 [2024-10-15 14:34:18,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:34:18,221 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 59 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:18,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 482 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-15 14:34:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-10-15 14:34:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2024-10-15 14:34:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 141 states have internal predecessors, (160), 101 states have call successors, (101), 22 states have call predecessors, (101), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-10-15 14:34:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2024-10-15 14:34:18,339 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 115 [2024-10-15 14:34:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:18,340 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2024-10-15 14:34:18,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2024-10-15 14:34:18,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2024-10-15 14:34:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-10-15 14:34:18,341 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:18,341 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 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] [2024-10-15 14:34:18,356 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-15 14:34:18,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:34:18,543 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:18,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash 34587587, now seen corresponding path program 4 times [2024-10-15 14:34:18,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:18,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397983625] [2024-10-15 14:34:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064485630] [2024-10-15 14:34:18,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:34:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:18,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:18,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-15 14:34:18,638 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:34:18,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:18,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 14:34:18,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-15 14:34:19,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397983625] [2024-10-15 14:34:19,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064485630] [2024-10-15 14:34:19,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064485630] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:19,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:19,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 14:34:19,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954854070] [2024-10-15 14:34:19,817 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:19,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:34:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:34:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:34:19,819 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-15 14:34:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:21,057 INFO L93 Difference]: Finished difference Result 295 states and 404 transitions. [2024-10-15 14:34:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:34:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2024-10-15 14:34:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:21,059 INFO L225 Difference]: With dead ends: 295 [2024-10-15 14:34:21,059 INFO L226 Difference]: Without dead ends: 293 [2024-10-15 14:34:21,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:34:21,060 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:21,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:34:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-10-15 14:34:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 269. [2024-10-15 14:34:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 146 states have internal predecessors, (164), 104 states have call successors, (104), 22 states have call predecessors, (104), 21 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-15 14:34:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 369 transitions. [2024-10-15 14:34:21,188 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 369 transitions. Word has length 117 [2024-10-15 14:34:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:21,188 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 369 transitions. [2024-10-15 14:34:21,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-15 14:34:21,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 369 transitions. [2024-10-15 14:34:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 14:34:21,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:21,190 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 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] [2024-10-15 14:34:21,203 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:21,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:34:21,392 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:21,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1783402708, now seen corresponding path program 5 times [2024-10-15 14:34:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739311212] [2024-10-15 14:34:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281079972] [2024-10-15 14:34:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:34:21,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:21,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:21,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:21,417 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-15 14:34:21,568 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-15 14:34:21,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:21,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-15 14:34:21,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-10-15 14:34:22,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739311212] [2024-10-15 14:34:43,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281079972] [2024-10-15 14:34:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281079972] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:34:43,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:34:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 14:34:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547846848] [2024-10-15 14:34:43,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:43,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 14:34:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 14:34:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=722, Unknown=2, NotChecked=0, Total=870 [2024-10-15 14:34:43,575 INFO L87 Difference]: Start difference. First operand 269 states and 369 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-15 14:34:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:44,456 INFO L93 Difference]: Finished difference Result 285 states and 382 transitions. [2024-10-15 14:34:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 14:34:44,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 120 [2024-10-15 14:34:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:44,459 INFO L225 Difference]: With dead ends: 285 [2024-10-15 14:34:44,459 INFO L226 Difference]: Without dead ends: 283 [2024-10-15 14:34:44,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=235, Invalid=1095, Unknown=2, NotChecked=0, Total=1332 [2024-10-15 14:34:44,460 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:44,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:34:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-10-15 14:34:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2024-10-15 14:34:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 152 states have (on average 1.138157894736842) internal successors, (173), 155 states have internal predecessors, (173), 104 states have call successors, (104), 25 states have call predecessors, (104), 24 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-15 14:34:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2024-10-15 14:34:44,596 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 120 [2024-10-15 14:34:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:44,597 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2024-10-15 14:34:44,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-15 14:34:44,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2024-10-15 14:34:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-10-15 14:34:44,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:44,598 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 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] [2024-10-15 14:34:44,607 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-15 14:34:44,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:44,803 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:44,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2078513889, now seen corresponding path program 2 times [2024-10-15 14:34:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:44,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139064208] [2024-10-15 14:34:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:44,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875466558] [2024-10-15 14:34:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:34:44,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:44,826 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:44,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-15 14:34:44,901 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:34:44,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:44,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-15 14:34:44,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:34:45,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-10-15 14:34:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139064208] [2024-10-15 14:34:46,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875466558] [2024-10-15 14:34:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875466558] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:46,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:46,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-10-15 14:34:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427866997] [2024-10-15 14:34:46,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:46,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:34:46,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:34:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:34:46,948 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-10-15 14:34:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:52,518 INFO L93 Difference]: Finished difference Result 414 states and 593 transitions. [2024-10-15 14:34:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-15 14:34:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) Word has length 126 [2024-10-15 14:34:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:52,521 INFO L225 Difference]: With dead ends: 414 [2024-10-15 14:34:52,521 INFO L226 Difference]: Without dead ends: 412 [2024-10-15 14:34:52,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=569, Invalid=2401, Unknown=0, NotChecked=0, Total=2970 [2024-10-15 14:34:52,523 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:52,523 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 591 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-10-15 14:34:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-10-15 14:34:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2024-10-15 14:34:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 202 states have (on average 1.183168316831683) internal successors, (239), 205 states have internal predecessors, (239), 162 states have call successors, (162), 28 states have call predecessors, (162), 27 states have return successors, (159), 158 states have call predecessors, (159), 159 states have call successors, (159) [2024-10-15 14:34:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 560 transitions. [2024-10-15 14:34:52,775 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 560 transitions. Word has length 126 [2024-10-15 14:34:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:52,775 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 560 transitions. [2024-10-15 14:34:52,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2024-10-15 14:34:52,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 560 transitions. [2024-10-15 14:34:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-10-15 14:34:52,777 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:52,778 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 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] [2024-10-15 14:34:52,794 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-15 14:34:52,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:52,979 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:52,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -627102050, now seen corresponding path program 2 times [2024-10-15 14:34:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689810693] [2024-10-15 14:34:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:52,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797597061] [2024-10-15 14:34:52,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:34:52,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:53,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:53,002 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:53,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-15 14:34:53,079 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:34:53,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:53,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:34:53,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:34:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 78 proven. 56 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-10-15 14:34:53,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:34:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-10-15 14:34:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:34:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689810693] [2024-10-15 14:34:54,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:34:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797597061] [2024-10-15 14:34:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797597061] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:34:54,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:34:54,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-10-15 14:34:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078979842] [2024-10-15 14:34:54,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:34:54,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:34:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:34:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:34:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:34:54,011 INFO L87 Difference]: Start difference. First operand 392 states and 560 transitions. Second operand has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-15 14:34:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:34:56,872 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2024-10-15 14:34:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 14:34:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 131 [2024-10-15 14:34:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:34:56,875 INFO L225 Difference]: With dead ends: 415 [2024-10-15 14:34:56,875 INFO L226 Difference]: Without dead ends: 405 [2024-10-15 14:34:56,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:34:56,876 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 67 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:34:56,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 695 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-15 14:34:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-10-15 14:34:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 395. [2024-10-15 14:34:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 206 states have internal predecessors, (238), 159 states have call successors, (159), 31 states have call predecessors, (159), 30 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-10-15 14:34:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2024-10-15 14:34:57,135 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 131 [2024-10-15 14:34:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:34:57,135 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2024-10-15 14:34:57,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-15 14:34:57,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2024-10-15 14:34:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-15 14:34:57,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:34:57,137 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:34:57,149 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-15 14:34:57,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:57,337 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:34:57,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:34:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash 231977005, now seen corresponding path program 6 times [2024-10-15 14:34:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:34:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373467263] [2024-10-15 14:34:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:34:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:34:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:34:57,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476059880] [2024-10-15 14:34:57,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:34:57,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:34:57,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:34:57,364 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:34:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-15 14:34:57,495 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:34:57,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:34:57,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-15 14:34:57,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 77 proven. 108 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2024-10-15 14:35:00,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373467263] [2024-10-15 14:35:07,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:35:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476059880] [2024-10-15 14:35:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476059880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:07,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:35:07,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:35:07,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496505425] [2024-10-15 14:35:07,388 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:07,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:35:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:35:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2024-10-15 14:35:07,390 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:35:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:12,554 INFO L93 Difference]: Finished difference Result 440 states and 609 transitions. [2024-10-15 14:35:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:35:12,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 132 [2024-10-15 14:35:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:12,557 INFO L225 Difference]: With dead ends: 440 [2024-10-15 14:35:12,557 INFO L226 Difference]: Without dead ends: 438 [2024-10-15 14:35:12,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=181, Invalid=940, Unknown=1, NotChecked=0, Total=1122 [2024-10-15 14:35:12,558 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 29 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:12,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 476 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-10-15 14:35:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-10-15 14:35:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2024-10-15 14:35:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 226 states have (on average 1.154867256637168) internal successors, (261), 227 states have internal predecessors, (261), 171 states have call successors, (171), 35 states have call predecessors, (171), 34 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-10-15 14:35:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 601 transitions. [2024-10-15 14:35:12,867 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 601 transitions. Word has length 132 [2024-10-15 14:35:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:12,867 INFO L471 AbstractCegarLoop]: Abstraction has 432 states and 601 transitions. [2024-10-15 14:35:12,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:35:12,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 601 transitions. [2024-10-15 14:35:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-10-15 14:35:12,870 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:12,870 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:12,878 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-15 14:35:13,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-15 14:35:13,071 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:13,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -456505470, now seen corresponding path program 7 times [2024-10-15 14:35:13,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:13,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502833451] [2024-10-15 14:35:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:35:13,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683577134] [2024-10-15 14:35:13,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:35:13,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:13,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:35:13,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-15 14:35:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:35:13,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 14:35:13,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 132 proven. 75 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-10-15 14:35:14,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502833451] [2024-10-15 14:35:14,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:35:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683577134] [2024-10-15 14:35:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683577134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:14,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:35:14,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 14:35:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351943374] [2024-10-15 14:35:14,429 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:14,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 14:35:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 14:35:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:35:14,430 INFO L87 Difference]: Start difference. First operand 432 states and 601 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-15 14:35:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:15,538 INFO L93 Difference]: Finished difference Result 466 states and 646 transitions. [2024-10-15 14:35:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:35:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 139 [2024-10-15 14:35:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:15,542 INFO L225 Difference]: With dead ends: 466 [2024-10-15 14:35:15,542 INFO L226 Difference]: Without dead ends: 464 [2024-10-15 14:35:15,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:35:15,543 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:15,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 465 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:35:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-10-15 14:35:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2024-10-15 14:35:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 242 states have internal predecessors, (278), 183 states have call successors, (183), 38 states have call predecessors, (183), 37 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:35:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 642 transitions. [2024-10-15 14:35:15,942 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 642 transitions. Word has length 139 [2024-10-15 14:35:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:15,943 INFO L471 AbstractCegarLoop]: Abstraction has 462 states and 642 transitions. [2024-10-15 14:35:15,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2024-10-15 14:35:15,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 642 transitions. [2024-10-15 14:35:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-10-15 14:35:15,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:15,945 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:15,961 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-15 14:35:16,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:35:16,146 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:16,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1541639723, now seen corresponding path program 8 times [2024-10-15 14:35:16,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:16,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988464545] [2024-10-15 14:35:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:16,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:35:16,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163288213] [2024-10-15 14:35:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:35:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:16,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:16,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:35:16,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-15 14:35:16,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:35:16,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:16,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-15 14:35:16,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 96 proven. 107 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-10-15 14:35:17,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:47,118 WARN L286 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 14:35:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:47,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988464545] [2024-10-15 14:35:47,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:35:47,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163288213] [2024-10-15 14:35:47,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163288213] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:47,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:35:47,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:35:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428129372] [2024-10-15 14:35:47,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:47,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:35:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:35:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=561, Unknown=1, NotChecked=0, Total=702 [2024-10-15 14:35:47,123 INFO L87 Difference]: Start difference. First operand 462 states and 642 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-10-15 14:35:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:48,381 INFO L93 Difference]: Finished difference Result 472 states and 651 transitions. [2024-10-15 14:35:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-15 14:35:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 142 [2024-10-15 14:35:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:48,384 INFO L225 Difference]: With dead ends: 472 [2024-10-15 14:35:48,384 INFO L226 Difference]: Without dead ends: 470 [2024-10-15 14:35:48,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=243, Invalid=946, Unknown=1, NotChecked=0, Total=1190 [2024-10-15 14:35:48,385 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:48,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:35:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-10-15 14:35:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 466. [2024-10-15 14:35:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 244 states have (on average 1.151639344262295) internal successors, (281), 245 states have internal predecessors, (281), 183 states have call successors, (183), 39 states have call predecessors, (183), 38 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:35:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 645 transitions. [2024-10-15 14:35:48,720 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 645 transitions. Word has length 142 [2024-10-15 14:35:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:48,720 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 645 transitions. [2024-10-15 14:35:48,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2024-10-15 14:35:48,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 645 transitions. [2024-10-15 14:35:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-10-15 14:35:48,722 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:48,722 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:48,734 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-15 14:35:48,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:48,922 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:48,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1016913677, now seen corresponding path program 9 times [2024-10-15 14:35:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:48,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877196316] [2024-10-15 14:35:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:35:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638194270] [2024-10-15 14:35:48,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:35:48,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:48,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:48,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:35:48,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-15 14:35:49,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:35:49,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:49,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-15 14:35:49,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2024-10-15 14:35:51,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:35:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:35:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877196316] [2024-10-15 14:35:52,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:35:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638194270] [2024-10-15 14:35:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638194270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:35:52,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:35:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:35:52,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534982850] [2024-10-15 14:35:52,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:35:52,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:35:52,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:35:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:35:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:35:52,180 INFO L87 Difference]: Start difference. First operand 466 states and 645 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:35:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:35:53,983 INFO L93 Difference]: Finished difference Result 486 states and 662 transitions. [2024-10-15 14:35:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 14:35:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 142 [2024-10-15 14:35:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:35:53,986 INFO L225 Difference]: With dead ends: 486 [2024-10-15 14:35:53,986 INFO L226 Difference]: Without dead ends: 484 [2024-10-15 14:35:53,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:35:53,987 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:35:53,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 541 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-15 14:35:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-10-15 14:35:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2024-10-15 14:35:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 254 states have internal predecessors, (290), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:35:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 654 transitions. [2024-10-15 14:35:54,302 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 654 transitions. Word has length 142 [2024-10-15 14:35:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:35:54,303 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 654 transitions. [2024-10-15 14:35:54,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:35:54,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 654 transitions. [2024-10-15 14:35:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-10-15 14:35:54,304 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:35:54,304 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:35:54,317 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-15 14:35:54,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:35:54,505 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:35:54,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:35:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1445963081, now seen corresponding path program 3 times [2024-10-15 14:35:54,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:35:54,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391677120] [2024-10-15 14:35:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:35:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:35:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:35:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886377311] [2024-10-15 14:35:54,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:35:54,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:35:54,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:35:54,529 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:35:54,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-15 14:35:54,608 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:35:54,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:35:54,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:35:54,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:35:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 95 proven. 37 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2024-10-15 14:35:55,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:36:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:36:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391677120] [2024-10-15 14:36:00,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:36:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886377311] [2024-10-15 14:36:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886377311] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:36:00,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:36:00,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 14:36:00,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253473739] [2024-10-15 14:36:00,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:36:00,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:36:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:36:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:36:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-10-15 14:36:00,178 INFO L87 Difference]: Start difference. First operand 478 states and 654 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-15 14:36:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:36:01,099 INFO L93 Difference]: Finished difference Result 488 states and 663 transitions. [2024-10-15 14:36:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:36:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 145 [2024-10-15 14:36:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:36:01,103 INFO L225 Difference]: With dead ends: 488 [2024-10-15 14:36:01,103 INFO L226 Difference]: Without dead ends: 481 [2024-10-15 14:36:01,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-10-15 14:36:01,105 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:36:01,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 233 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:36:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-10-15 14:36:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2024-10-15 14:36:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 253 states have (on average 1.1422924901185771) internal successors, (289), 254 states have internal predecessors, (289), 183 states have call successors, (183), 42 states have call predecessors, (183), 41 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:36:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 653 transitions. [2024-10-15 14:36:01,510 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 653 transitions. Word has length 145 [2024-10-15 14:36:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:36:01,510 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 653 transitions. [2024-10-15 14:36:01,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-10-15 14:36:01,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 653 transitions. [2024-10-15 14:36:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-10-15 14:36:01,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:36:01,513 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:36:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-15 14:36:01,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:36:01,714 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:36:01,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:01,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1961731402, now seen corresponding path program 10 times [2024-10-15 14:36:01,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:36:01,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677558007] [2024-10-15 14:36:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:36:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:36:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:36:01,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833639932] [2024-10-15 14:36:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:36:01,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:36:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:36:01,742 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:36:01,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-15 14:36:01,818 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:36:01,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:36:01,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-15 14:36:01,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:36:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 95 proven. 89 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2024-10-15 14:36:02,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:36:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 123 proven. 7 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-10-15 14:36:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:36:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677558007] [2024-10-15 14:36:02,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:36:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833639932] [2024-10-15 14:36:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833639932] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:36:02,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:36:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2024-10-15 14:36:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758074472] [2024-10-15 14:36:02,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:36:02,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:36:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:36:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:36:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:36:02,612 INFO L87 Difference]: Start difference. First operand 478 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-10-15 14:36:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:36:05,500 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2024-10-15 14:36:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:36:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 154 [2024-10-15 14:36:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:36:05,502 INFO L225 Difference]: With dead ends: 501 [2024-10-15 14:36:05,503 INFO L226 Difference]: Without dead ends: 499 [2024-10-15 14:36:05,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:36:05,503 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-15 14:36:05,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 512 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-15 14:36:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-10-15 14:36:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 486. [2024-10-15 14:36:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 259 states have (on average 1.138996138996139) internal successors, (295), 260 states have internal predecessors, (295), 183 states have call successors, (183), 44 states have call predecessors, (183), 43 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:36:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 659 transitions. [2024-10-15 14:36:05,822 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 659 transitions. Word has length 154 [2024-10-15 14:36:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:36:05,822 INFO L471 AbstractCegarLoop]: Abstraction has 486 states and 659 transitions. [2024-10-15 14:36:05,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-10-15 14:36:05,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 659 transitions. [2024-10-15 14:36:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-10-15 14:36:05,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:36:05,825 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:36:05,838 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-15 14:36:06,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:36:06,025 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:36:06,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1660634611, now seen corresponding path program 11 times [2024-10-15 14:36:06,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:36:06,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852664757] [2024-10-15 14:36:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:36:06,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:36:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:36:06,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039329852] [2024-10-15 14:36:06,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:36:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:36:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:36:06,051 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:36:06,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-15 14:36:06,434 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:36:06,434 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:36:06,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-15 14:36:06,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:36:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-10-15 14:36:07,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:36:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-10-15 14:36:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:36:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852664757] [2024-10-15 14:36:07,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:36:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039329852] [2024-10-15 14:36:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039329852] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:36:07,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:36:07,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2024-10-15 14:36:07,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284732303] [2024-10-15 14:36:07,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:36:07,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 14:36:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:36:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 14:36:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:36:07,977 INFO L87 Difference]: Start difference. First operand 486 states and 659 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-10-15 14:36:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:36:09,987 INFO L93 Difference]: Finished difference Result 523 states and 714 transitions. [2024-10-15 14:36:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:36:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 159 [2024-10-15 14:36:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:36:09,990 INFO L225 Difference]: With dead ends: 523 [2024-10-15 14:36:09,990 INFO L226 Difference]: Without dead ends: 521 [2024-10-15 14:36:09,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:36:09,992 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 48 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:36:09,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 625 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-15 14:36:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-10-15 14:36:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2024-10-15 14:36:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 262 states have (on average 1.1374045801526718) internal successors, (298), 263 states have internal predecessors, (298), 183 states have call successors, (183), 45 states have call predecessors, (183), 44 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:36:10,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 662 transitions. [2024-10-15 14:36:10,417 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 662 transitions. Word has length 159 [2024-10-15 14:36:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:36:10,418 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 662 transitions. [2024-10-15 14:36:10,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (54), 3 states have call predecessors, (54), 1 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2024-10-15 14:36:10,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 662 transitions. [2024-10-15 14:36:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-10-15 14:36:10,420 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:36:10,420 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:36:10,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-15 14:36:10,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:36:10,621 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:36:10,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1550967297, now seen corresponding path program 12 times [2024-10-15 14:36:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:36:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682450893] [2024-10-15 14:36:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:36:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:36:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:36:10,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267672904] [2024-10-15 14:36:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:36:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:36:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:36:10,656 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:36:10,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-15 14:36:10,794 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-15 14:36:10,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:36:10,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-15 14:36:10,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:36:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 183 proven. 103 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2024-10-15 14:36:11,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:36:11,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:36:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682450893] [2024-10-15 14:36:11,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:36:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267672904] [2024-10-15 14:36:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267672904] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:36:11,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:36:11,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 14:36:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244715246] [2024-10-15 14:36:11,676 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:36:11,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:36:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:36:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:36:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-15 14:36:11,677 INFO L87 Difference]: Start difference. First operand 490 states and 662 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-10-15 14:36:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:36:12,565 INFO L93 Difference]: Finished difference Result 502 states and 672 transitions. [2024-10-15 14:36:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 14:36:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 161 [2024-10-15 14:36:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:36:12,568 INFO L225 Difference]: With dead ends: 502 [2024-10-15 14:36:12,568 INFO L226 Difference]: Without dead ends: 500 [2024-10-15 14:36:12,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:36:12,569 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:36:12,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 287 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:36:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-10-15 14:36:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 459. [2024-10-15 14:36:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 249 states have internal predecessors, (281), 167 states have call successors, (167), 44 states have call predecessors, (167), 43 states have return successors, (165), 165 states have call predecessors, (165), 165 states have call successors, (165) [2024-10-15 14:36:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 613 transitions. [2024-10-15 14:36:12,983 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 613 transitions. Word has length 161 [2024-10-15 14:36:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:36:12,983 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 613 transitions. [2024-10-15 14:36:12,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2024-10-15 14:36:12,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 613 transitions. [2024-10-15 14:36:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-10-15 14:36:12,985 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:36:12,985 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:36:12,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-15 14:36:13,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:36:13,186 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:36:13,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:36:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 359715818, now seen corresponding path program 13 times [2024-10-15 14:36:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:36:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794826215] [2024-10-15 14:36:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:36:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:36:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:36:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477835044] [2024-10-15 14:36:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:36:13,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:36:13,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:36:13,219 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:36:13,220 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-15 14:36:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:36:13,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-15 14:36:13,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:36:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 116 proven. 157 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2024-10-15 14:36:15,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:36:30,948 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-15 14:37:09,602 WARN L286 SmtUtils]: Spent 9.16s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-15 14:37:09,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:37:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794826215] [2024-10-15 14:37:09,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:37:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477835044] [2024-10-15 14:37:09,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477835044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:37:09,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:37:09,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-15 14:37:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780060791] [2024-10-15 14:37:09,603 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:37:09,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:37:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:37:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:37:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 14:37:09,605 INFO L87 Difference]: Start difference. First operand 459 states and 613 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-15 14:37:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:37:11,930 INFO L93 Difference]: Finished difference Result 483 states and 639 transitions. [2024-10-15 14:37:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:37:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-10-15 14:37:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:37:11,934 INFO L225 Difference]: With dead ends: 483 [2024-10-15 14:37:11,934 INFO L226 Difference]: Without dead ends: 481 [2024-10-15 14:37:11,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:37:11,936 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:37:11,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 409 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:37:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-10-15 14:37:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2024-10-15 14:37:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 259 states have (on average 1.1312741312741312) internal successors, (293), 260 states have internal predecessors, (293), 171 states have call successors, (171), 47 states have call predecessors, (171), 46 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2024-10-15 14:37:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 633 transitions. [2024-10-15 14:37:12,340 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 633 transitions. Word has length 164 [2024-10-15 14:37:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:37:12,340 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 633 transitions. [2024-10-15 14:37:12,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 11 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-15 14:37:12,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 633 transitions. [2024-10-15 14:37:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-10-15 14:37:12,343 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:37:12,343 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:37:12,360 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-15 14:37:12,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-15 14:37:12,544 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:37:12,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1256755380, now seen corresponding path program 14 times [2024-10-15 14:37:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:37:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250847551] [2024-10-15 14:37:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:37:12,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:37:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:37:12,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765832289] [2024-10-15 14:37:12,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:37:12,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:37:12,565 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:37:12,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-15 14:37:12,670 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:37:12,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:37:12,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 14:37:12,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:37:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 210 proven. 156 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2024-10-15 14:37:19,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:37:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:37:20,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250847551] [2024-10-15 14:37:20,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:37:20,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765832289] [2024-10-15 14:37:20,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765832289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:37:20,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:37:20,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-15 14:37:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666456689] [2024-10-15 14:37:20,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:37:20,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 14:37:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:37:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 14:37:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-10-15 14:37:20,354 INFO L87 Difference]: Start difference. First operand 477 states and 633 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-15 14:37:26,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-10-15 14:37:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:37:29,084 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2024-10-15 14:37:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 14:37:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 164 [2024-10-15 14:37:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:37:29,087 INFO L225 Difference]: With dead ends: 526 [2024-10-15 14:37:29,087 INFO L226 Difference]: Without dead ends: 524 [2024-10-15 14:37:29,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-10-15 14:37:29,088 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:37:29,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 812 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2024-10-15 14:37:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-10-15 14:37:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 514. [2024-10-15 14:37:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 280 states have (on average 1.1285714285714286) internal successors, (316), 281 states have internal predecessors, (316), 183 states have call successors, (183), 51 states have call predecessors, (183), 50 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2024-10-15 14:37:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 680 transitions. [2024-10-15 14:37:29,604 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 680 transitions. Word has length 164 [2024-10-15 14:37:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:37:29,604 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 680 transitions. [2024-10-15 14:37:29,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-15 14:37:29,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 680 transitions. [2024-10-15 14:37:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-10-15 14:37:29,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:37:29,606 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:37:29,625 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-15 14:37:29,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:29,811 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:37:29,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1039525467, now seen corresponding path program 15 times [2024-10-15 14:37:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:37:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100059513] [2024-10-15 14:37:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:37:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:37:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:37:29,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252808093] [2024-10-15 14:37:29,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:37:29,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:29,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:37:29,831 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:37:29,835 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-15 14:37:30,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-15 14:37:30,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:37:30,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-15 14:37:30,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:37:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 174 proven. 32 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-10-15 14:37:31,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:37:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:37:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100059513] [2024-10-15 14:37:32,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:37:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252808093] [2024-10-15 14:37:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252808093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:37:32,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:37:32,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-15 14:37:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781610602] [2024-10-15 14:37:32,536 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:37:32,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-15 14:37:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:37:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-15 14:37:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:37:32,537 INFO L87 Difference]: Start difference. First operand 514 states and 680 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:37:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:37:34,955 INFO L93 Difference]: Finished difference Result 574 states and 765 transitions. [2024-10-15 14:37:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-15 14:37:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 167 [2024-10-15 14:37:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:37:34,959 INFO L225 Difference]: With dead ends: 574 [2024-10-15 14:37:34,959 INFO L226 Difference]: Without dead ends: 572 [2024-10-15 14:37:34,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:37:34,960 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:37:34,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:37:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-10-15 14:37:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 568. [2024-10-15 14:37:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 207 states have call successors, (207), 54 states have call predecessors, (207), 53 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-10-15 14:37:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 759 transitions. [2024-10-15 14:37:35,409 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 759 transitions. Word has length 167 [2024-10-15 14:37:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:37:35,409 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 759 transitions. [2024-10-15 14:37:35,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2024-10-15 14:37:35,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 759 transitions. [2024-10-15 14:37:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-10-15 14:37:35,412 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:37:35,412 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2024-10-15 14:37:35,427 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-15 14:37:35,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:35,613 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:37:35,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:35,613 INFO L85 PathProgramCache]: Analyzing trace with hash 487523073, now seen corresponding path program 4 times [2024-10-15 14:37:35,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:37:35,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402756492] [2024-10-15 14:37:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:37:35,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:37:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:37:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177084085] [2024-10-15 14:37:35,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:37:35,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:35,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:37:35,641 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:37:35,643 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-15 14:37:35,723 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:37:35,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:37:35,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-15 14:37:35,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:37:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 113 proven. 110 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-10-15 14:37:37,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:37:40,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:37:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402756492] [2024-10-15 14:37:40,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:37:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177084085] [2024-10-15 14:37:40,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177084085] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:37:40,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:37:40,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-15 14:37:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923502755] [2024-10-15 14:37:40,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:37:40,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:37:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:37:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:37:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 14:37:40,676 INFO L87 Difference]: Start difference. First operand 568 states and 759 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-10-15 14:37:42,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:37:42,861 INFO L93 Difference]: Finished difference Result 628 states and 839 transitions. [2024-10-15 14:37:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 14:37:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 170 [2024-10-15 14:37:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:37:42,865 INFO L225 Difference]: With dead ends: 628 [2024-10-15 14:37:42,865 INFO L226 Difference]: Without dead ends: 621 [2024-10-15 14:37:42,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 14:37:42,866 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:37:42,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 490 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:37:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-10-15 14:37:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 596. [2024-10-15 14:37:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 323 states have (on average 1.130030959752322) internal successors, (365), 324 states have internal predecessors, (365), 215 states have call successors, (215), 58 states have call predecessors, (215), 57 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2024-10-15 14:37:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 793 transitions. [2024-10-15 14:37:43,354 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 793 transitions. Word has length 170 [2024-10-15 14:37:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:37:43,354 INFO L471 AbstractCegarLoop]: Abstraction has 596 states and 793 transitions. [2024-10-15 14:37:43,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-10-15 14:37:43,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 793 transitions. [2024-10-15 14:37:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-10-15 14:37:43,357 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:37:43,357 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2024-10-15 14:37:43,371 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-15 14:37:43,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-15 14:37:43,558 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:37:43,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:37:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1959567971, now seen corresponding path program 5 times [2024-10-15 14:37:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:37:43,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291772255] [2024-10-15 14:37:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:37:43,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:37:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:37:43,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134843851] [2024-10-15 14:37:43,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:37:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:37:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:37:43,578 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 14:37:43,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-15 14:37:43,711 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-15 14:37:43,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:37:43,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-15 14:37:43,722 INFO L278 TraceCheckSpWp]: Computing forward predicates...