./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.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-scaling/egcd3-ll_valuebound5.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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --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 14:48:09,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:48:09,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:48:09,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:48:09,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:48:09,882 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:48:09,883 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:48:09,883 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:48:09,883 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:48:09,884 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:48:09,884 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:48:09,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:48:09,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:48:09,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:48:09,888 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:48:09,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:48:09,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:48:09,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:48:09,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:48:09,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:48:09,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:48:09,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:48:09,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:48:09,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:48:09,895 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:48:09,895 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:48:09,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:48:09,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:48:09,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:48:09,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:09,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:48:09,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:48:09,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:48:09,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:48:09,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:48:09,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:48:09,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:48:09,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:48:10,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:48:10,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:48:10,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:48:10,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:48:10,133 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:48:10,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-10-15 14:48:11,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:48:11,656 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:48:11,656 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2024-10-15 14:48:11,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/921680b70/4279e392c50c4a6d9949e75a2619c824/FLAG44f8ae9f4 [2024-10-15 14:48:11,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/921680b70/4279e392c50c4a6d9949e75a2619c824 [2024-10-15 14:48:11,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:48:11,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:48:11,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:11,683 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:48:11,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:48:11,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f35ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11, skipping insertion in model container [2024-10-15 14:48:11,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,717 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:48:11,857 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-scaling/egcd3-ll_valuebound5.c[490,503] [2024-10-15 14:48:11,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:11,887 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:48:11,898 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-scaling/egcd3-ll_valuebound5.c[490,503] [2024-10-15 14:48:11,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:48:11,919 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:48:11,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11 WrapperNode [2024-10-15 14:48:11,919 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:48:11,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:11,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:48:11,920 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:48:11,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,935 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:48:11,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:48:11,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:48:11,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:48:11,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:48:11,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,955 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 14:48:11,955 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,955 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,957 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:48:11,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:48:11,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:48:11,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:48:11,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (1/1) ... [2024-10-15 14:48:11,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:48:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:11,989 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 14:48:11,990 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 14:48:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:48:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 14:48:12,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 14:48:12,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:48:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:48:12,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:48:12,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:48:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:48:12,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:48:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:48:12,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:48:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:48:12,069 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:48:12,071 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:48:12,216 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-15 14:48:12,216 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:48:12,242 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:48:12,243 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 14:48:12,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:12 BoogieIcfgContainer [2024-10-15 14:48:12,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:48:12,246 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:48:12,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:48:12,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:48:12,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:48:11" (1/3) ... [2024-10-15 14:48:12,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482d8108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:12, skipping insertion in model container [2024-10-15 14:48:12,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:48:11" (2/3) ... [2024-10-15 14:48:12,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482d8108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:48:12, skipping insertion in model container [2024-10-15 14:48:12,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:48:12" (3/3) ... [2024-10-15 14:48:12,253 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2024-10-15 14:48:12,270 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:48:12,270 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:48:12,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:48:12,318 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;@78451dee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:48:12,318 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:48:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-15 14:48:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 14:48:12,328 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:12,329 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 14:48:12,329 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:12,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-10-15 14:48:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:12,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764895396] [2024-10-15 14:48:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,453 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,461 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 14:48:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764895396] [2024-10-15 14:48:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764895396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:12,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:12,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:48:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11450602] [2024-10-15 14:48:12,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:12,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:48:12,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:48:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:48:12,497 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 14:48:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:12,527 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-10-15 14:48:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:48:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 32 [2024-10-15 14:48:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:12,535 INFO L225 Difference]: With dead ends: 70 [2024-10-15 14:48:12,535 INFO L226 Difference]: Without dead ends: 34 [2024-10-15 14:48:12,537 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 14:48:12,540 INFO L432 NwaCegarLoop]: 45 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, 45 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 14:48:12,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-15 14:48:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-15 14:48:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-15 14:48:12,568 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-10-15 14:48:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:12,568 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-15 14:48:12,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 14:48:12,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-15 14:48:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-15 14:48:12,570 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:12,570 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 14:48:12,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:48:12,571 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:12,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-10-15 14:48:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:12,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078438054] [2024-10-15 14:48:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:12,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:12,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078438054] [2024-10-15 14:48:12,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078438054] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:12,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:12,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-15 14:48:12,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86072466] [2024-10-15 14:48:12,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:12,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-15 14:48:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-15 14:48:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:12,741 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:12,817 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-10-15 14:48:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-10-15 14:48:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:12,823 INFO L225 Difference]: With dead ends: 53 [2024-10-15 14:48:12,823 INFO L226 Difference]: Without dead ends: 46 [2024-10-15 14:48:12,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:48:12,843 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:12,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-15 14:48:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-10-15 14:48:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-15 14:48:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-10-15 14:48:12,874 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-10-15 14:48:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:12,874 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-10-15 14:48:12,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-10-15 14:48:12,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-10-15 14:48:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-15 14:48:12,879 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:12,879 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, 1, 1, 1] [2024-10-15 14:48:12,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:48:12,880 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:12,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-10-15 14:48:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:12,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528932452] [2024-10-15 14:48:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:12,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520915958] [2024-10-15 14:48:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:12,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:12,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:12,945 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 14:48:12,948 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 14:48:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:13,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:13,123 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 14:48:13,123 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528932452] [2024-10-15 14:48:13,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:13,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520915958] [2024-10-15 14:48:13,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520915958] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:13,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:13,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:13,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758110112] [2024-10-15 14:48:13,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:13,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:13,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:13,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:13,129 INFO L87 Difference]: Start difference. First operand 36 states and 45 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, (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 14:48:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:13,177 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-10-15 14:48:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:13,177 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, (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 36 [2024-10-15 14:48:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:13,179 INFO L225 Difference]: With dead ends: 52 [2024-10-15 14:48:13,179 INFO L226 Difference]: Without dead ends: 50 [2024-10-15 14:48:13,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 14:48:13,181 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:13,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-15 14:48:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-10-15 14:48:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-15 14:48:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-10-15 14:48:13,194 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-10-15 14:48:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:13,194 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-10-15 14:48:13,194 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, (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 14:48:13,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-10-15 14:48:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 14:48:13,195 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:13,196 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, 1] [2024-10-15 14:48:13,210 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:13,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,398 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:13,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-10-15 14:48:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755282761] [2024-10-15 14:48:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,547 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755282761] [2024-10-15 14:48:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755282761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324666566] [2024-10-15 14:48:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:13,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:13,587 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 14:48:13,592 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 14:48:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:13,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:13,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:13,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324666566] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:13,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:13,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-10-15 14:48:13,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209037547] [2024-10-15 14:48:13,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:13,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-15 14:48:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-15 14:48:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 14:48:13,717 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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 14:48:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:13,867 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-10-15 14:48:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:48:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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 38 [2024-10-15 14:48:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:13,869 INFO L225 Difference]: With dead ends: 102 [2024-10-15 14:48:13,869 INFO L226 Difference]: Without dead ends: 95 [2024-10-15 14:48:13,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 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 14:48:13,870 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:13,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-15 14:48:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-10-15 14:48:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-10-15 14:48:13,885 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-10-15 14:48:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:13,885 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-10-15 14:48:13,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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 14:48:13,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-10-15 14:48:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:13,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:13,886 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, 1, 1, 1, 1] [2024-10-15 14:48:13,899 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:14,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:14,091 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:14,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:14,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-10-15 14:48:14,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:14,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937645870] [2024-10-15 14:48:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:14,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:14,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419765688] [2024-10-15 14:48:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:14,103 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 14:48:14,106 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 14:48:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:14,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-15 14:48:14,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:14,205 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 14:48:14,206 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937645870] [2024-10-15 14:48:14,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419765688] [2024-10-15 14:48:14,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419765688] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:14,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:14,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963602806] [2024-10-15 14:48:14,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:14,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:14,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:14,207 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 14:48:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:14,249 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-10-15 14:48:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:14,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 41 [2024-10-15 14:48:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:14,250 INFO L225 Difference]: With dead ends: 78 [2024-10-15 14:48:14,250 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 14:48:14,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 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 14:48:14,251 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:14,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 14:48:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-10-15 14:48:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-15 14:48:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-10-15 14:48:14,263 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-10-15 14:48:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:14,263 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-10-15 14:48:14,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 14:48:14,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-10-15 14:48:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 14:48:14,264 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:14,264 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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 14:48:14,277 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:14,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:14,469 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:14,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-10-15 14:48:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:14,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225502871] [2024-10-15 14:48:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:14,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:14,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748198595] [2024-10-15 14:48:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:14,485 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 14:48:14,488 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 14:48:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:14,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-15 14:48:14,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-15 14:48:14,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:15,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:15,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225502871] [2024-10-15 14:48:15,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:15,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748198595] [2024-10-15 14:48:15,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748198595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:15,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:15,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-10-15 14:48:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578959137] [2024-10-15 14:48:15,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:15,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 14:48:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 14:48:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-10-15 14:48:15,048 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:16,276 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-10-15 14:48:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 14:48:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-10-15 14:48:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:16,278 INFO L225 Difference]: With dead ends: 132 [2024-10-15 14:48:16,278 INFO L226 Difference]: Without dead ends: 130 [2024-10-15 14:48:16,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-10-15 14:48:16,279 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:16,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:48:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-15 14:48:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-10-15 14:48:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-10-15 14:48:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-10-15 14:48:16,303 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-10-15 14:48:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:16,303 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-10-15 14:48:16,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:16,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-10-15 14:48:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:16,304 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:16,304 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:16,318 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 14:48:16,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:16,509 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:16,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-10-15 14:48:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:16,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814500216] [2024-10-15 14:48:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:16,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951334511] [2024-10-15 14:48:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:16,521 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 14:48:16,524 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 14:48:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:16,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:16,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 14:48:16,618 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:16,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814500216] [2024-10-15 14:48:16,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951334511] [2024-10-15 14:48:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951334511] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:16,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:16,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087841442] [2024-10-15 14:48:16,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:16,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:16,619 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:16,720 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-10-15 14:48:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-10-15 14:48:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:16,723 INFO L225 Difference]: With dead ends: 155 [2024-10-15 14:48:16,723 INFO L226 Difference]: Without dead ends: 153 [2024-10-15 14:48:16,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 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 14:48:16,725 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:16,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-10-15 14:48:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-10-15 14:48:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-15 14:48:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-10-15 14:48:16,794 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-10-15 14:48:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:16,796 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-10-15 14:48:16,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-15 14:48:16,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-10-15 14:48:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 14:48:16,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:16,799 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:16,812 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 14:48:17,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 14:48:17,004 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-10-15 14:48:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916833096] [2024-10-15 14:48:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:17,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210924802] [2024-10-15 14:48:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:17,024 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 14:48:17,025 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 14:48:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-15 14:48:17,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:17,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916833096] [2024-10-15 14:48:17,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210924802] [2024-10-15 14:48:17,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210924802] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:17,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:17,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-10-15 14:48:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503417517] [2024-10-15 14:48:17,209 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:48:17,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:48:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:17,210 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 14:48:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:17,427 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-10-15 14:48:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 14:48:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 46 [2024-10-15 14:48:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:17,429 INFO L225 Difference]: With dead ends: 174 [2024-10-15 14:48:17,430 INFO L226 Difference]: Without dead ends: 172 [2024-10-15 14:48:17,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:48:17,432 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:17,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:48:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-15 14:48:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-10-15 14:48:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-10-15 14:48:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-10-15 14:48:17,475 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-10-15 14:48:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:17,475 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-10-15 14:48:17,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 14:48:17,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-10-15 14:48:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:17,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:17,479 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:17,500 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:17,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,680 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:17,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-10-15 14:48:17,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:17,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28760004] [2024-10-15 14:48:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108643700] [2024-10-15 14:48:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:17,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:17,698 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 14:48:17,699 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 14:48:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:17,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-15 14:48:17,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:17,823 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 14:48:17,824 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 14:48:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28760004] [2024-10-15 14:48:17,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108643700] [2024-10-15 14:48:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108643700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:17,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289663164] [2024-10-15 14:48:17,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:17,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:17,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:17,826 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 14:48:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:17,948 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-10-15 14:48:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 51 [2024-10-15 14:48:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:17,952 INFO L225 Difference]: With dead ends: 254 [2024-10-15 14:48:17,952 INFO L226 Difference]: Without dead ends: 252 [2024-10-15 14:48:17,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 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 14:48:17,953 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:17,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-10-15 14:48:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-10-15 14:48:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-10-15 14:48:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-10-15 14:48:18,008 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-10-15 14:48:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:18,009 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-10-15 14:48:18,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 14:48:18,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-10-15 14:48:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-15 14:48:18,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:18,010 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:18,025 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 14:48:18,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,211 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:18,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-10-15 14:48:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695939316] [2024-10-15 14:48:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 14:48:18,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:18,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695939316] [2024-10-15 14:48:18,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695939316] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:18,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124799436] [2024-10-15 14:48:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:18,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:18,273 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 14:48:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:18,449 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-10-15 14:48:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:48:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 51 [2024-10-15 14:48:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:18,456 INFO L225 Difference]: With dead ends: 291 [2024-10-15 14:48:18,456 INFO L226 Difference]: Without dead ends: 177 [2024-10-15 14:48:18,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 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 14:48:18,462 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:18,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:48:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-15 14:48:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-10-15 14:48:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-10-15 14:48:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-10-15 14:48:18,542 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-10-15 14:48:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:18,543 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-10-15 14:48:18,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 14:48:18,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-10-15 14:48:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-15 14:48:18,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:18,544 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:18,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-15 14:48:18,544 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:18,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-10-15 14:48:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:18,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594147189] [2024-10-15 14:48:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585901722] [2024-10-15 14:48:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:18,559 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 14:48:18,563 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 14:48:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:18,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-15 14:48:18,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-15 14:48:19,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-10-15 14:48:20,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594147189] [2024-10-15 14:48:20,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585901722] [2024-10-15 14:48:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585901722] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:20,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140527279] [2024-10-15 14:48:20,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:20,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:20,689 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:24,804 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-10-15 14:48:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-15 14:48:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-10-15 14:48:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:24,809 INFO L225 Difference]: With dead ends: 393 [2024-10-15 14:48:24,809 INFO L226 Difference]: Without dead ends: 385 [2024-10-15 14:48:24,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-10-15 14:48:24,810 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:24,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-15 14:48:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-10-15 14:48:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-10-15 14:48:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-10-15 14:48:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-10-15 14:48:24,891 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-10-15 14:48:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:24,892 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-10-15 14:48:24,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-15 14:48:24,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-10-15 14:48:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:24,893 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:24,893 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, 1, 1, 1] [2024-10-15 14:48:24,905 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:25,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:25,098 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:25,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-10-15 14:48:25,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434865360] [2024-10-15 14:48:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 14:48:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-15 14:48:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-15 14:48:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-15 14:48:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:25,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434865360] [2024-10-15 14:48:25,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434865360] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:48:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:48:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:48:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621296307] [2024-10-15 14:48:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:25,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:48:25,173 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-15 14:48:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:25,300 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-10-15 14:48:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-10-15 14:48:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:25,302 INFO L225 Difference]: With dead ends: 399 [2024-10-15 14:48:25,302 INFO L226 Difference]: Without dead ends: 243 [2024-10-15 14:48:25,302 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 14:48:25,303 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:25,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-10-15 14:48:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-10-15 14:48:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-10-15 14:48:25,379 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-10-15 14:48:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:25,380 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-10-15 14:48:25,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-15 14:48:25,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-10-15 14:48:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-15 14:48:25,381 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:25,381 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1] [2024-10-15 14:48:25,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-15 14:48:25,381 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:25,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:25,381 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-10-15 14:48:25,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:25,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308535595] [2024-10-15 14:48:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:25,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157661674] [2024-10-15 14:48:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:25,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:25,403 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 14:48:25,404 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 14:48:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:25,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-15 14:48:25,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-10-15 14:48:25,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-10-15 14:48:25,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:25,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308535595] [2024-10-15 14:48:25,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157661674] [2024-10-15 14:48:25,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157661674] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:25,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:48:25,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-15 14:48:25,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423693377] [2024-10-15 14:48:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:48:25,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:48:25,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:48:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:48:25,558 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:25,682 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-10-15 14:48:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:48:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-10-15 14:48:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:25,684 INFO L225 Difference]: With dead ends: 234 [2024-10-15 14:48:25,684 INFO L226 Difference]: Without dead ends: 232 [2024-10-15 14:48:25,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:48:25,685 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 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 14:48:25,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:48:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-10-15 14:48:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-10-15 14:48:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-10-15 14:48:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-10-15 14:48:25,784 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-10-15 14:48:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:25,784 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-10-15 14:48:25,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-15 14:48:25,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-10-15 14:48:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:25,785 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:25,785 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:25,798 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:25,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 14:48:25,990 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:25,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-10-15 14:48:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:25,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179221055] [2024-10-15 14:48:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836439261] [2024-10-15 14:48:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:26,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:26,003 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 14:48:26,004 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 14:48:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:26,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-15 14:48:26,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-15 14:48:26,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-15 14:48:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179221055] [2024-10-15 14:48:27,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:27,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836439261] [2024-10-15 14:48:27,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836439261] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:27,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:27,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-10-15 14:48:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983239937] [2024-10-15 14:48:27,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:27,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:48:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:48:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-10-15 14:48:27,271 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:32,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:32,065 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2024-10-15 14:48:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 14:48:32,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-10-15 14:48:32,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:32,067 INFO L225 Difference]: With dead ends: 350 [2024-10-15 14:48:32,067 INFO L226 Difference]: Without dead ends: 348 [2024-10-15 14:48:32,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:48:32,069 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 162 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:32,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 444 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-10-15 14:48:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-10-15 14:48:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 325. [2024-10-15 14:48:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 188 states have internal predecessors, (230), 123 states have call successors, (123), 15 states have call predecessors, (123), 14 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2024-10-15 14:48:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 474 transitions. [2024-10-15 14:48:32,275 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 474 transitions. Word has length 71 [2024-10-15 14:48:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:32,276 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 474 transitions. [2024-10-15 14:48:32,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:48:32,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 474 transitions. [2024-10-15 14:48:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-15 14:48:32,277 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:32,277 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:32,293 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 14:48:32,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 14:48:32,480 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:32,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-10-15 14:48:32,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:32,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684265768] [2024-10-15 14:48:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633539739] [2024-10-15 14:48:32,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:32,507 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 14:48:32,508 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 14:48:32,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:32,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:32,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-15 14:48:32,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-15 14:48:32,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-10-15 14:48:32,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684265768] [2024-10-15 14:48:32,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633539739] [2024-10-15 14:48:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633539739] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:32,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-10-15 14:48:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382787816] [2024-10-15 14:48:32,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:32,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:32,859 INFO L87 Difference]: Start difference. First operand 325 states and 474 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:33,791 INFO L93 Difference]: Finished difference Result 426 states and 616 transitions. [2024-10-15 14:48:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 14:48:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-10-15 14:48:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:33,794 INFO L225 Difference]: With dead ends: 426 [2024-10-15 14:48:33,794 INFO L226 Difference]: Without dead ends: 424 [2024-10-15 14:48:33,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-15 14:48:33,795 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:33,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 14:48:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-10-15 14:48:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2024-10-15 14:48:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 231 states have (on average 1.2337662337662338) internal successors, (285), 232 states have internal predecessors, (285), 155 states have call successors, (155), 17 states have call predecessors, (155), 16 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2024-10-15 14:48:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 593 transitions. [2024-10-15 14:48:33,988 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 593 transitions. Word has length 71 [2024-10-15 14:48:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:33,989 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 593 transitions. [2024-10-15 14:48:33,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:33,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 593 transitions. [2024-10-15 14:48:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-15 14:48:33,990 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:33,990 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:33,998 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 14:48:34,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 14:48:34,191 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:34,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-10-15 14:48:34,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:34,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656512368] [2024-10-15 14:48:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:34,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735207522] [2024-10-15 14:48:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:34,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:34,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:34,209 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 14:48:34,210 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 14:48:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:34,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-15 14:48:34,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-10-15 14:48:34,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-10-15 14:48:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656512368] [2024-10-15 14:48:37,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735207522] [2024-10-15 14:48:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735207522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:37,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:37,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-10-15 14:48:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359323454] [2024-10-15 14:48:37,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:37,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:48:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:48:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:37,409 INFO L87 Difference]: Start difference. First operand 403 states and 593 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:43,872 INFO L93 Difference]: Finished difference Result 544 states and 801 transitions. [2024-10-15 14:48:43,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-15 14:48:43,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-10-15 14:48:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:43,876 INFO L225 Difference]: With dead ends: 544 [2024-10-15 14:48:43,879 INFO L226 Difference]: Without dead ends: 540 [2024-10-15 14:48:43,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 14:48:43,880 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 204 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:43,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 683 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-10-15 14:48:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-10-15 14:48:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 526. [2024-10-15 14:48:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 302 states have (on average 1.2384105960264902) internal successors, (374), 303 states have internal predecessors, (374), 203 states have call successors, (203), 21 states have call predecessors, (203), 20 states have return successors, (201), 201 states have call predecessors, (201), 201 states have call successors, (201) [2024-10-15 14:48:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 778 transitions. [2024-10-15 14:48:44,216 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 778 transitions. Word has length 85 [2024-10-15 14:48:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:44,216 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 778 transitions. [2024-10-15 14:48:44,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-10-15 14:48:44,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 778 transitions. [2024-10-15 14:48:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:44,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:44,218 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:44,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-15 14:48:44,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-15 14:48:44,422 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:44,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-10-15 14:48:44,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:44,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436099858] [2024-10-15 14:48:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559636136] [2024-10-15 14:48:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:44,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:44,447 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 14:48:44,448 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 14:48:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:44,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-15 14:48:44,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-10-15 14:48:44,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-10-15 14:48:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436099858] [2024-10-15 14:48:45,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559636136] [2024-10-15 14:48:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559636136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:45,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:45,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-10-15 14:48:45,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557324799] [2024-10-15 14:48:45,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:45,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-15 14:48:45,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-15 14:48:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-15 14:48:45,028 INFO L87 Difference]: Start difference. First operand 526 states and 778 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:46,901 INFO L93 Difference]: Finished difference Result 1227 states and 1964 transitions. [2024-10-15 14:48:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:48:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-10-15 14:48:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:46,907 INFO L225 Difference]: With dead ends: 1227 [2024-10-15 14:48:46,908 INFO L226 Difference]: Without dead ends: 1225 [2024-10-15 14:48:46,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:48:46,909 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 141 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:46,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 14:48:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2024-10-15 14:48:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1156. [2024-10-15 14:48:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 553 states have (on average 1.332730560578662) internal successors, (737), 554 states have internal predecessors, (737), 579 states have call successors, (579), 24 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1893 transitions. [2024-10-15 14:48:47,782 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1893 transitions. Word has length 98 [2024-10-15 14:48:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:47,783 INFO L471 AbstractCegarLoop]: Abstraction has 1156 states and 1893 transitions. [2024-10-15 14:48:47,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-10-15 14:48:47,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1893 transitions. [2024-10-15 14:48:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-15 14:48:47,784 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:47,784 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 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] [2024-10-15 14:48:47,798 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 14:48:47,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-15 14:48:47,985 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:47,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-10-15 14:48:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203033190] [2024-10-15 14:48:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:48,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306214268] [2024-10-15 14:48:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:48:48,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:48,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:48,024 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 14:48:48,025 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 14:48:48,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 14:48:48,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:48,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-15 14:48:48,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:48,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-10-15 14:48:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203033190] [2024-10-15 14:48:48,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:48:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306214268] [2024-10-15 14:48:48,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306214268] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:48,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:48:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-10-15 14:48:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135957460] [2024-10-15 14:48:48,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:48,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 14:48:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 14:48:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:48:48,813 INFO L87 Difference]: Start difference. First operand 1156 states and 1893 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:51,436 INFO L93 Difference]: Finished difference Result 1373 states and 2256 transitions. [2024-10-15 14:48:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:48:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-10-15 14:48:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:51,447 INFO L225 Difference]: With dead ends: 1373 [2024-10-15 14:48:51,447 INFO L226 Difference]: Without dead ends: 1369 [2024-10-15 14:48:51,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:48:51,450 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 81 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:51,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 392 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 14:48:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2024-10-15 14:48:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1158. [2024-10-15 14:48:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 555 states have (on average 1.3297297297297297) internal successors, (738), 555 states have internal predecessors, (738), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1894 transitions. [2024-10-15 14:48:52,591 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1894 transitions. Word has length 96 [2024-10-15 14:48:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:52,591 INFO L471 AbstractCegarLoop]: Abstraction has 1158 states and 1894 transitions. [2024-10-15 14:48:52,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-10-15 14:48:52,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1894 transitions. [2024-10-15 14:48:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-10-15 14:48:52,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:52,594 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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 14:48:52,603 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 14:48:52,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-15 14:48:52,794 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:52,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-10-15 14:48:52,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:52,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668976212] [2024-10-15 14:48:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:52,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:48:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:48:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:48:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:48:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:48:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:48:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:48:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:48:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-15 14:48:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-15 14:48:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-10-15 14:48:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-15 14:48:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-15 14:48:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:48:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:48:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668976212] [2024-10-15 14:48:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668976212] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:48:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000515489] [2024-10-15 14:48:52,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:52,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:52,998 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 14:48:52,999 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 14:48:53,075 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:53,075 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:53,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-15 14:48:53,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:53,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:48:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-15 14:48:53,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000515489] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:48:53,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:48:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-10-15 14:48:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636953622] [2024-10-15 14:48:53,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:48:53,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 14:48:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:48:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 14:48:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-15 14:48:53,209 INFO L87 Difference]: Start difference. First operand 1158 states and 1894 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:48:54,649 INFO L93 Difference]: Finished difference Result 1291 states and 2100 transitions. [2024-10-15 14:48:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 14:48:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-10-15 14:48:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:48:54,656 INFO L225 Difference]: With dead ends: 1291 [2024-10-15 14:48:54,656 INFO L226 Difference]: Without dead ends: 1286 [2024-10-15 14:48:54,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:48:54,657 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:48:54,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 457 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:48:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-10-15 14:48:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1152. [2024-10-15 14:48:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 549 states have (on average 1.331511839708561) internal successors, (731), 549 states have internal predecessors, (731), 579 states have call successors, (579), 25 states have call predecessors, (579), 23 states have return successors, (577), 577 states have call predecessors, (577), 577 states have call successors, (577) [2024-10-15 14:48:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1887 transitions. [2024-10-15 14:48:55,746 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1887 transitions. Word has length 98 [2024-10-15 14:48:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:48:55,746 INFO L471 AbstractCegarLoop]: Abstraction has 1152 states and 1887 transitions. [2024-10-15 14:48:55,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-10-15 14:48:55,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1887 transitions. [2024-10-15 14:48:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-10-15 14:48:55,748 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:48:55,748 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:48:55,753 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 14:48:55,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:55,949 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:48:55,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:48:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-10-15 14:48:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:48:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566992043] [2024-10-15 14:48:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:48:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:48:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:48:55,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729639615] [2024-10-15 14:48:55,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:48:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:48:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:48:55,969 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 14:48:55,977 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 14:48:56,035 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:48:56,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:48:56,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-15 14:48:56,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:48:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:48:57,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:49:01,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566992043] [2024-10-15 14:49:01,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729639615] [2024-10-15 14:49:01,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729639615] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:01,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:01,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2024-10-15 14:49:01,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070016890] [2024-10-15 14:49:01,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:01,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-15 14:49:01,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-15 14:49:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 14:49:01,347 INFO L87 Difference]: Start difference. First operand 1152 states and 1887 transitions. Second operand has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-15 14:49:13,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:49:18,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:49:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:35,305 INFO L93 Difference]: Finished difference Result 1643 states and 2666 transitions. [2024-10-15 14:49:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-10-15 14:49:35,305 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 112 [2024-10-15 14:49:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:35,312 INFO L225 Difference]: With dead ends: 1643 [2024-10-15 14:49:35,312 INFO L226 Difference]: Without dead ends: 1244 [2024-10-15 14:49:35,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1625, Invalid=8077, Unknown=0, NotChecked=0, Total=9702 [2024-10-15 14:49:35,316 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 298 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:35,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 978 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1351 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2024-10-15 14:49:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-10-15 14:49:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1002. [2024-10-15 14:49:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 495 states have (on average 1.298989898989899) internal successors, (643), 495 states have internal predecessors, (643), 479 states have call successors, (479), 29 states have call predecessors, (479), 27 states have return successors, (477), 477 states have call predecessors, (477), 477 states have call successors, (477) [2024-10-15 14:49:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1599 transitions. [2024-10-15 14:49:36,544 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1599 transitions. Word has length 112 [2024-10-15 14:49:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:36,544 INFO L471 AbstractCegarLoop]: Abstraction has 1002 states and 1599 transitions. [2024-10-15 14:49:36,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 12 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-10-15 14:49:36,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1599 transitions. [2024-10-15 14:49:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:36,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:36,546 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:36,559 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 14:49:36,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:36,746 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:36,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-10-15 14:49:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36545400] [2024-10-15 14:49:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546730890] [2024-10-15 14:49:36,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:49:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:36,770 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 14:49:36,778 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 14:49:36,840 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:49:36,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:36,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-15 14:49:36,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:37,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:49:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-10-15 14:49:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:49:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36545400] [2024-10-15 14:49:40,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:49:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546730890] [2024-10-15 14:49:40,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546730890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:49:40,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:49:40,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-10-15 14:49:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734299871] [2024-10-15 14:49:40,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:49:40,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 14:49:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:49:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 14:49:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-10-15 14:49:40,559 INFO L87 Difference]: Start difference. First operand 1002 states and 1599 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:49:55,829 INFO L93 Difference]: Finished difference Result 1406 states and 2243 transitions. [2024-10-15 14:49:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-10-15 14:49:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-10-15 14:49:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:49:55,843 INFO L225 Difference]: With dead ends: 1406 [2024-10-15 14:49:55,843 INFO L226 Difference]: Without dead ends: 1400 [2024-10-15 14:49:55,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1592, Invalid=7914, Unknown=0, NotChecked=0, Total=9506 [2024-10-15 14:49:55,846 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 321 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:49:55,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 850 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-10-15 14:49:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-10-15 14:49:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1181. [2024-10-15 14:49:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 588 states have (on average 1.2976190476190477) internal successors, (763), 588 states have internal predecessors, (763), 563 states have call successors, (563), 31 states have call predecessors, (563), 29 states have return successors, (561), 561 states have call predecessors, (561), 561 states have call successors, (561) [2024-10-15 14:49:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1887 transitions. [2024-10-15 14:49:57,557 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1887 transitions. Word has length 115 [2024-10-15 14:49:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:49:57,557 INFO L471 AbstractCegarLoop]: Abstraction has 1181 states and 1887 transitions. [2024-10-15 14:49:57,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-10-15 14:49:57,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1887 transitions. [2024-10-15 14:49:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-15 14:49:57,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:49:57,559 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:49:57,571 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-15 14:49:57,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:57,759 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:49:57,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:49:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-10-15 14:49:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:49:57,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142663221] [2024-10-15 14:49:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:49:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:49:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:49:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93659116] [2024-10-15 14:49:57,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:49:57,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:49:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:49:57,777 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 14:49:57,778 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 14:49:57,837 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:49:57,837 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:49:57,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-15 14:49:57,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:49:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-10-15 14:49:59,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:04,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142663221] [2024-10-15 14:50:04,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:04,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93659116] [2024-10-15 14:50:04,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93659116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:50:04,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:50:04,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-15 14:50:04,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690363056] [2024-10-15 14:50:04,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:04,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 14:50:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:04,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 14:50:04,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:50:04,600 INFO L87 Difference]: Start difference. First operand 1181 states and 1887 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:50:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:07,996 INFO L93 Difference]: Finished difference Result 1325 states and 2100 transitions. [2024-10-15 14:50:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 14:50:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-10-15 14:50:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:08,002 INFO L225 Difference]: With dead ends: 1325 [2024-10-15 14:50:08,002 INFO L226 Difference]: Without dead ends: 1320 [2024-10-15 14:50:08,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 14:50:08,004 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:08,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 541 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 14:50:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-10-15 14:50:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1295. [2024-10-15 14:50:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 642 states have (on average 1.2990654205607477) internal successors, (834), 642 states have internal predecessors, (834), 619 states have call successors, (619), 35 states have call predecessors, (619), 33 states have return successors, (617), 617 states have call predecessors, (617), 617 states have call successors, (617) [2024-10-15 14:50:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2070 transitions. [2024-10-15 14:50:09,868 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2070 transitions. Word has length 115 [2024-10-15 14:50:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:09,869 INFO L471 AbstractCegarLoop]: Abstraction has 1295 states and 2070 transitions. [2024-10-15 14:50:09,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:50:09,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2070 transitions. [2024-10-15 14:50:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 14:50:09,870 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:09,870 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 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] [2024-10-15 14:50:09,883 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 14:50:10,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-15 14:50:10,071 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:10,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-10-15 14:50:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:10,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006346460] [2024-10-15 14:50:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:10,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860430245] [2024-10-15 14:50:10,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:50:10,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:10,120 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 14:50:10,121 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 14:50:10,218 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-15 14:50:10,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:50:10,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-15 14:50:10,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 51 proven. 108 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2024-10-15 14:50:11,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006346460] [2024-10-15 14:50:15,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860430245] [2024-10-15 14:50:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860430245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:50:15,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:50:15,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-15 14:50:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099416419] [2024-10-15 14:50:15,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:15,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-15 14:50:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-15 14:50:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2024-10-15 14:50:15,262 INFO L87 Difference]: Start difference. First operand 1295 states and 2070 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:50:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:19,639 INFO L93 Difference]: Finished difference Result 1521 states and 2421 transitions. [2024-10-15 14:50:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 14:50:19,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 120 [2024-10-15 14:50:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:19,650 INFO L225 Difference]: With dead ends: 1521 [2024-10-15 14:50:19,650 INFO L226 Difference]: Without dead ends: 1516 [2024-10-15 14:50:19,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 14:50:19,651 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:19,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 951 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:50:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2024-10-15 14:50:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1386. [2024-10-15 14:50:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 685 states have (on average 1.2992700729927007) internal successors, (890), 685 states have internal predecessors, (890), 663 states have call successors, (663), 39 states have call predecessors, (663), 37 states have return successors, (661), 661 states have call predecessors, (661), 661 states have call successors, (661) [2024-10-15 14:50:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2214 transitions. [2024-10-15 14:50:21,810 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2214 transitions. Word has length 120 [2024-10-15 14:50:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:21,811 INFO L471 AbstractCegarLoop]: Abstraction has 1386 states and 2214 transitions. [2024-10-15 14:50:21,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-10-15 14:50:21,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2214 transitions. [2024-10-15 14:50:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-15 14:50:21,813 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:21,813 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, 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 14:50:21,824 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 14:50:22,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-15 14:50:22,018 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:22,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-10-15 14:50:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:22,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987501159] [2024-10-15 14:50:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:22,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818435331] [2024-10-15 14:50:22,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:50:22,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:22,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:22,034 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 14:50:22,035 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 14:50:22,127 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-15 14:50:22,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:50:22,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-15 14:50:22,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-15 14:50:23,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-10-15 14:50:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987501159] [2024-10-15 14:50:26,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818435331] [2024-10-15 14:50:26,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818435331] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:26,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:50:26,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-10-15 14:50:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39869206] [2024-10-15 14:50:26,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:26,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-15 14:50:26,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-15 14:50:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-10-15 14:50:26,337 INFO L87 Difference]: Start difference. First operand 1386 states and 2214 transitions. Second operand has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-15 14:50:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:38,851 INFO L93 Difference]: Finished difference Result 2389 states and 3902 transitions. [2024-10-15 14:50:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-10-15 14:50:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 132 [2024-10-15 14:50:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:38,862 INFO L225 Difference]: With dead ends: 2389 [2024-10-15 14:50:38,862 INFO L226 Difference]: Without dead ends: 2383 [2024-10-15 14:50:38,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1501, Invalid=9419, Unknown=0, NotChecked=0, Total=10920 [2024-10-15 14:50:38,865 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 238 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:38,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1302 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-10-15 14:50:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2024-10-15 14:50:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1680. [2024-10-15 14:50:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 822 states have (on average 1.3065693430656935) internal successors, (1074), 822 states have internal predecessors, (1074), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 817 states have call predecessors, (817), 817 states have call successors, (817) [2024-10-15 14:50:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2710 transitions. [2024-10-15 14:50:41,821 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2710 transitions. Word has length 132 [2024-10-15 14:50:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:41,821 INFO L471 AbstractCegarLoop]: Abstraction has 1680 states and 2710 transitions. [2024-10-15 14:50:41,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 30 states have internal predecessors, (62), 13 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-15 14:50:41,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2710 transitions. [2024-10-15 14:50:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-15 14:50:41,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:41,824 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:50:41,831 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-15 14:50:42,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-15 14:50:42,025 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:42,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 125055237, now seen corresponding path program 7 times [2024-10-15 14:50:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232750861] [2024-10-15 14:50:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:50:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 14:50:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 14:50:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-15 14:50:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 14:50:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,152 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-10-15 14:50:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,155 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-15 14:50:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-15 14:50:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-15 14:50:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-15 14:50:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-15 14:50:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-10-15 14:50:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-10-15 14:50:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-10-15 14:50:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-15 14:50:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-10-15 14:50:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-15 14:50:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-10-15 14:50:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-10-15 14:50:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-10-15 14:50:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-10-15 14:50:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-10-15 14:50:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232750861] [2024-10-15 14:50:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232750861] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:50:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43981260] [2024-10-15 14:50:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-15 14:50:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:42,203 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 14:50:42,207 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 14:50:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:50:42,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:50:42,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 250 proven. 18 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-10-15 14:50:42,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-10-15 14:50:42,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43981260] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:42,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:50:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-10-15 14:50:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287241259] [2024-10-15 14:50:42,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:42,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 14:50:42,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 14:50:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-15 14:50:42,396 INFO L87 Difference]: Start difference. First operand 1680 states and 2710 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:50:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:50:45,789 INFO L93 Difference]: Finished difference Result 2843 states and 4592 transitions. [2024-10-15 14:50:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 14:50:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 137 [2024-10-15 14:50:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:50:45,799 INFO L225 Difference]: With dead ends: 2843 [2024-10-15 14:50:45,799 INFO L226 Difference]: Without dead ends: 1920 [2024-10-15 14:50:45,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 311 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-15 14:50:45,806 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:50:45,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 286 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:50:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2024-10-15 14:50:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1741. [2024-10-15 14:50:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 883 states have (on average 1.2865232163080407) internal successors, (1136), 907 states have internal predecessors, (1136), 819 states have call successors, (819), 40 states have call predecessors, (819), 38 states have return successors, (817), 793 states have call predecessors, (817), 817 states have call successors, (817) [2024-10-15 14:50:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2772 transitions. [2024-10-15 14:50:48,585 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2772 transitions. Word has length 137 [2024-10-15 14:50:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:50:48,585 INFO L471 AbstractCegarLoop]: Abstraction has 1741 states and 2772 transitions. [2024-10-15 14:50:48,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2024-10-15 14:50:48,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2772 transitions. [2024-10-15 14:50:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-10-15 14:50:48,587 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:50:48,588 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-10-15 14:50:48,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-15 14:50:48,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-15 14:50:48,788 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:50:48,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:50:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 8 times [2024-10-15 14:50:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:50:48,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537185498] [2024-10-15 14:50:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:50:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:50:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:50:48,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155174833] [2024-10-15 14:50:48,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:50:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:50:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:50:48,813 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 14:50:48,814 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 14:50:48,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:50:48,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:50:48,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-15 14:50:48,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:50:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 82 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-15 14:50:50,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:50:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-10-15 14:50:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:50:54,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537185498] [2024-10-15 14:50:54,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:50:54,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155174833] [2024-10-15 14:50:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155174833] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:50:54,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:50:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2024-10-15 14:50:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291145806] [2024-10-15 14:50:54,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:50:54,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-15 14:50:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:50:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-15 14:50:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2024-10-15 14:50:54,825 INFO L87 Difference]: Start difference. First operand 1741 states and 2772 transitions. Second operand has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-15 14:51:02,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:51:29,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-15 14:51:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:51:47,847 INFO L93 Difference]: Finished difference Result 2076 states and 3230 transitions. [2024-10-15 14:51:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-10-15 14:51:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) Word has length 140 [2024-10-15 14:51:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:51:47,857 INFO L225 Difference]: With dead ends: 2076 [2024-10-15 14:51:47,857 INFO L226 Difference]: Without dead ends: 1901 [2024-10-15 14:51:47,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=2237, Invalid=8682, Unknown=1, NotChecked=0, Total=10920 [2024-10-15 14:51:47,859 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 347 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2024-10-15 14:51:47,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 908 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2024-10-15 14:51:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2024-10-15 14:51:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1774. [2024-10-15 14:51:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 907 states have (on average 1.2855567805953694) internal successors, (1166), 936 states have internal predecessors, (1166), 827 states have call successors, (827), 41 states have call predecessors, (827), 39 states have return successors, (825), 796 states have call predecessors, (825), 825 states have call successors, (825) [2024-10-15 14:51:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 2818 transitions. [2024-10-15 14:51:52,041 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 2818 transitions. Word has length 140 [2024-10-15 14:51:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:51:52,041 INFO L471 AbstractCegarLoop]: Abstraction has 1774 states and 2818 transitions. [2024-10-15 14:51:52,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.189189189189189) internal successors, (81), 38 states have internal predecessors, (81), 13 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2024-10-15 14:51:52,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 2818 transitions. [2024-10-15 14:51:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-10-15 14:51:52,043 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:51:52,043 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:51:52,056 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-15 14:51:52,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-15 14:51:52,248 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:51:52,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:51:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1581427678, now seen corresponding path program 9 times [2024-10-15 14:51:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:51:52,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499226831] [2024-10-15 14:51:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:51:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:51:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:51:52,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14212401] [2024-10-15 14:51:52,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:51:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:51:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:51:52,264 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 14:51:52,266 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 14:51:52,350 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-15 14:51:52,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:51:52,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-15 14:51:52,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:51:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 70 proven. 88 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-15 14:51:54,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:51:58,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:51:58,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499226831] [2024-10-15 14:51:58,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:51:58,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14212401] [2024-10-15 14:51:58,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14212401] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:51:58,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:51:58,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 14:51:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910905138] [2024-10-15 14:51:58,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:51:58,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:51:58,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:51:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:51:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 14:51:58,815 INFO L87 Difference]: Start difference. First operand 1774 states and 2818 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:52:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:52:05,805 INFO L93 Difference]: Finished difference Result 2041 states and 3249 transitions. [2024-10-15 14:52:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 14:52:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2024-10-15 14:52:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:52:05,815 INFO L225 Difference]: With dead ends: 2041 [2024-10-15 14:52:05,815 INFO L226 Difference]: Without dead ends: 2036 [2024-10-15 14:52:05,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2024-10-15 14:52:05,816 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:52:05,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 622 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 14:52:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2024-10-15 14:52:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1822. [2024-10-15 14:52:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 930 states have (on average 1.2860215053763442) internal successors, (1196), 959 states have internal predecessors, (1196), 851 states have call successors, (851), 42 states have call predecessors, (851), 40 states have return successors, (849), 820 states have call predecessors, (849), 849 states have call successors, (849) [2024-10-15 14:52:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2896 transitions. [2024-10-15 14:52:10,161 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2896 transitions. Word has length 142 [2024-10-15 14:52:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:52:10,161 INFO L471 AbstractCegarLoop]: Abstraction has 1822 states and 2896 transitions. [2024-10-15 14:52:10,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:52:10,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2896 transitions. [2024-10-15 14:52:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-10-15 14:52:10,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:52:10,168 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:52:10,193 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-15 14:52:10,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-15 14:52:10,368 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:52:10,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1042986500, now seen corresponding path program 10 times [2024-10-15 14:52:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:52:10,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236250315] [2024-10-15 14:52:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:52:10,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:52:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:52:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994735366] [2024-10-15 14:52:10,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:52:10,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:52:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:52:10,406 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 14:52:10,407 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 14:52:10,467 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:52:10,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:52:10,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-15 14:52:10,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:52:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 76 proven. 94 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-10-15 14:52:12,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:16,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236250315] [2024-10-15 14:52:16,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994735366] [2024-10-15 14:52:16,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994735366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:52:16,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 14:52:16,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-10-15 14:52:16,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194223069] [2024-10-15 14:52:16,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:16,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 14:52:16,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:16,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 14:52:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 14:52:16,957 INFO L87 Difference]: Start difference. First operand 1822 states and 2896 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:52:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:52:23,999 INFO L93 Difference]: Finished difference Result 2125 states and 3361 transitions. [2024-10-15 14:52:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 14:52:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 145 [2024-10-15 14:52:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:52:24,008 INFO L225 Difference]: With dead ends: 2125 [2024-10-15 14:52:24,008 INFO L226 Difference]: Without dead ends: 2120 [2024-10-15 14:52:24,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2024-10-15 14:52:24,009 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 108 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:52:24,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 977 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 14:52:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2024-10-15 14:52:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2062. [2024-10-15 14:52:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1049 states have (on average 1.2878932316491898) internal successors, (1351), 1084 states have internal predecessors, (1351), 966 states have call successors, (966), 48 states have call predecessors, (966), 46 states have return successors, (964), 929 states have call predecessors, (964), 964 states have call successors, (964) [2024-10-15 14:52:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3281 transitions. [2024-10-15 14:52:29,027 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3281 transitions. Word has length 145 [2024-10-15 14:52:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:52:29,028 INFO L471 AbstractCegarLoop]: Abstraction has 2062 states and 3281 transitions. [2024-10-15 14:52:29,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2024-10-15 14:52:29,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3281 transitions. [2024-10-15 14:52:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-10-15 14:52:29,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:52:29,032 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:52:29,048 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 14:52:29,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-15 14:52:29,236 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:52:29,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:52:29,236 INFO L85 PathProgramCache]: Analyzing trace with hash -723812761, now seen corresponding path program 11 times [2024-10-15 14:52:29,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:52:29,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582792233] [2024-10-15 14:52:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:52:29,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:52:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 14:52:29,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214234648] [2024-10-15 14:52:29,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:52:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:52:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:52:29,260 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 14:52:29,261 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 14:52:29,427 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-15 14:52:29,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:52:29,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-10-15 14:52:29,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:52:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 92 proven. 173 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-15 14:52:31,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:52:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 103 proven. 162 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-15 14:52:40,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:52:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582792233] [2024-10-15 14:52:40,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 14:52:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214234648] [2024-10-15 14:52:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214234648] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:52:40,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 14:52:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 53 [2024-10-15 14:52:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059391398] [2024-10-15 14:52:40,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 14:52:40,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-15 14:52:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:52:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-15 14:52:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2457, Unknown=1, NotChecked=0, Total=2756 [2024-10-15 14:52:40,690 INFO L87 Difference]: Start difference. First operand 2062 states and 3281 transitions. Second operand has 53 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 46 states have internal predecessors, (104), 19 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40)